diff --git a/MapControl/Shared/AutoEquirectangularProjection.cs b/MapControl/Shared/AutoEquirectangularProjection.cs
index 749afa38..aeb558d3 100644
--- a/MapControl/Shared/AutoEquirectangularProjection.cs
+++ b/MapControl/Shared/AutoEquirectangularProjection.cs
@@ -12,7 +12,7 @@ namespace MapControl
     /// <summary>
     /// Auto-Equirectangular Projection - AUTO2:42004.
     /// Equidistant cylindrical projection with standard parallel and central meridian set by the Center property.
-    /// See "Map Projections - A Working Manual" (https://pubs.usgs.gov/pp/1395/report.pdf), p.90-91.
+    /// See "Map Projections - A Working Manual" (https://pubs.usgs.gov/publication/pp1395), p.90-91.
     /// </summary>
     public class AutoEquirectangularProjection : MapProjection
     {
diff --git a/MapControl/Shared/AzimuthalEquidistantProjection.cs b/MapControl/Shared/AzimuthalEquidistantProjection.cs
index 88ed851d..e5cc1c5f 100644
--- a/MapControl/Shared/AzimuthalEquidistantProjection.cs
+++ b/MapControl/Shared/AzimuthalEquidistantProjection.cs
@@ -11,7 +11,7 @@ namespace MapControl
 {
     /// <summary>
     /// Spherical Azimuthal Equidistant Projection - No standard CRS ID.
-    /// See "Map Projections - A Working Manual" (https://pubs.usgs.gov/pp/1395/report.pdf), p.195-197.
+    /// See "Map Projections - A Working Manual" (https://pubs.usgs.gov/publication/pp1395), p.195-197.
     /// </summary>
     public class AzimuthalEquidistantProjection : AzimuthalProjection
     {
diff --git a/MapControl/Shared/EquirectangularProjection.cs b/MapControl/Shared/EquirectangularProjection.cs
index 588222f4..b186db5b 100644
--- a/MapControl/Shared/EquirectangularProjection.cs
+++ b/MapControl/Shared/EquirectangularProjection.cs
@@ -12,7 +12,7 @@ namespace MapControl
     /// <summary>
     /// Equirectangular Projection - EPSG:4326.
     /// Equidistant cylindrical projection with zero standard parallel and central meridian.
-    /// See "Map Projections - A Working Manual" (https://pubs.usgs.gov/pp/1395/report.pdf), p.90-91.
+    /// See "Map Projections - A Working Manual" (https://pubs.usgs.gov/publication/pp1395), p.90-91.
     /// </summary>
     public class EquirectangularProjection : MapProjection
     {
diff --git a/MapControl/Shared/GnomonicProjection.cs b/MapControl/Shared/GnomonicProjection.cs
index da02c079..1c49fcbd 100644
--- a/MapControl/Shared/GnomonicProjection.cs
+++ b/MapControl/Shared/GnomonicProjection.cs
@@ -11,7 +11,7 @@ namespace MapControl
 {
     /// <summary>
     /// Spherical Gnomonic Projection - AUTO2:97001.
-    /// See "Map Projections - A Working Manual" (https://pubs.usgs.gov/pp/1395/report.pdf), p.165-167.
+    /// See "Map Projections - A Working Manual" (https://pubs.usgs.gov/publication/pp1395), p.165-167.
     /// </summary>
     public class GnomonicProjection : AzimuthalProjection
     {
diff --git a/MapControl/Shared/OrthographicProjection.cs b/MapControl/Shared/OrthographicProjection.cs
index e2e56309..4881646c 100644
--- a/MapControl/Shared/OrthographicProjection.cs
+++ b/MapControl/Shared/OrthographicProjection.cs
@@ -11,7 +11,7 @@ namespace MapControl
 {
     /// <summary>
     /// Spherical Orthographic Projection - AUTO2:42003.
-    /// See "Map Projections - A Working Manual" (https://pubs.usgs.gov/pp/1395/report.pdf), p.148-150.
+    /// See "Map Projections - A Working Manual" (https://pubs.usgs.gov/publication/pp1395), p.148-150.
     /// </summary>
     public class OrthographicProjection : AzimuthalProjection
     {
diff --git a/MapControl/Shared/PolarStereographicProjection.cs b/MapControl/Shared/PolarStereographicProjection.cs
index 43107a4b..aeece963 100644
--- a/MapControl/Shared/PolarStereographicProjection.cs
+++ b/MapControl/Shared/PolarStereographicProjection.cs
@@ -12,7 +12,7 @@ namespace MapControl
     /// <summary>
     /// Elliptical Polar Stereographic Projection with a given scale factor at the pole and
     /// optional false easting and northing, as used by the UPS North and UPS South projections.
-    /// See "Map Projections - A Working Manual" (https://pubs.usgs.gov/pp/1395/report.pdf), p.154-163.
+    /// See "Map Projections - A Working Manual" (https://pubs.usgs.gov/publication/pp1395), p.154-163.
     /// </summary>
     public class PolarStereographicProjection : MapProjection
     {
diff --git a/MapControl/Shared/StereographicProjection.cs b/MapControl/Shared/StereographicProjection.cs
index fec94bea..efa907a0 100644
--- a/MapControl/Shared/StereographicProjection.cs
+++ b/MapControl/Shared/StereographicProjection.cs
@@ -11,7 +11,7 @@ namespace MapControl
 {
     /// <summary>
     /// Spherical Stereographic Projection - AUTO2:97002.
-    /// See "Map Projections - A Working Manual" (https://pubs.usgs.gov/pp/1395/report.pdf), p.157-160.
+    /// See "Map Projections - A Working Manual" (https://pubs.usgs.gov/publication/pp1395), p.157-160.
     /// </summary>
     public class StereographicProjection : AzimuthalProjection
     {
diff --git a/MapControl/Shared/WebMercatorProjection.cs b/MapControl/Shared/WebMercatorProjection.cs
index b9d9a327..c576b67e 100644
--- a/MapControl/Shared/WebMercatorProjection.cs
+++ b/MapControl/Shared/WebMercatorProjection.cs
@@ -11,7 +11,7 @@ namespace MapControl
 {
     /// <summary>
     /// Spherical Mercator Projection - EPSG:3857.
-    /// See "Map Projections - A Working Manual" (https://pubs.usgs.gov/pp/1395/report.pdf), p.41-44.
+    /// See "Map Projections - A Working Manual" (https://pubs.usgs.gov/publication/pp1395), p.41-44.
     /// </summary>
     public class WebMercatorProjection : MapProjection
     {
diff --git a/MapControl/Shared/WorldMercatorProjection.cs b/MapControl/Shared/WorldMercatorProjection.cs
index 68699d90..7ad486a9 100644
--- a/MapControl/Shared/WorldMercatorProjection.cs
+++ b/MapControl/Shared/WorldMercatorProjection.cs
@@ -11,7 +11,7 @@ namespace MapControl
 {
     /// <summary>
     /// Elliptical Mercator Projection - EPSG:3395.
-    /// See "Map Projections - A Working Manual" (https://pubs.usgs.gov/pp/1395/report.pdf), p.44-45.
+    /// See "Map Projections - A Working Manual" (https://pubs.usgs.gov/publication/pp1395), p.44-45.
     /// </summary>
     public class WorldMercatorProjection : MapProjection
     {