diff --git a/make-includes/build_content_rules.make b/make-includes/build_content_rules.make
index e4991ff..d8b302e 100755
--- a/make-includes/build_content_rules.make
+++ b/make-includes/build_content_rules.make
@@ -68,6 +68,7 @@
 vpath %.ps graphics images
 vpath %-print.png $(BUILD_DIR)
 vpath %.png graphics images
+vpath %.pdf graphics images
 
 
 ################################################################################
@@ -99,7 +100,8 @@
 
 ################################################################################
 #
-# Build correctly cropped EPS (for printing) from source EPS or PS.
+# Build correctly cropped PDF (for printing) from source EPS or PS. See below
+# for handling PDF sources.
 #
 # Notes on ps2eps options:
 #
@@ -145,7 +147,7 @@
 
 ################################################################################
 #
-# Build correctly cropped PNGs for web display from the source EPS or PS.
+# Build correctly cropped PNGs for web display from source EPS, PS or PDF.
 #
 # It might seem to make more sense to generate the PNGs from the print
 # EPS, which has already been appropriately cropped (see above). However,
@@ -172,6 +174,12 @@
 		gs -q -dNOPAUSE -dBATCH -dSAFER -sDEVICE=png16m -dEPSCrop -r96 \
 		-dTextAlphaBits=4 -dGraphicsAlphaBits=4 -sOutputFile=$@ -
 	@mv $@ $(BUILD_DIR)
+
+%-web.png: %.pdf
+	@announce "Generating $@ (web)"
+	gs -q -dNOPAUSE -dBATCH -dSAFER -sDEVICE=png16m -r96 \
+		-dTextAlphaBits=4 -dGraphicsAlphaBits=4 -sOutputFile=$@ $<
+	@mv $@ $(BUILD_DIR)
 #
 # Build 144 DPI version for zoomed web display
 #
@@ -189,6 +197,12 @@
 		-dTextAlphaBits=4 -dGraphicsAlphaBits=4 -sOutputFile=$@ -
 	@mv $@ $(BUILD_DIR)
 
+%-web-zoom.png: %.pdf
+	@announce "Generating $@ (zoomed web)"
+	gs -q -dNOPAUSE -dBATCH -dSAFER -sDEVICE=png16m -r144 \
+		-dTextAlphaBits=4 -dGraphicsAlphaBits=4 -sOutputFile=$@ $<
+	@mv $@ $(BUILD_DIR)
+
 #
 # Are 600 DPI versions even needed?? They don't seem to be used anywhere...
 #
@@ -217,6 +231,16 @@
 	@cp $< $(BUILD_DIR)/$@
 
 
+################################################################################
+#
+# There may be a few graphics that already come in PDF form (e.g., generated
+# from Visio originals). We don't need to generate anything; rather
+# we just copy the original file to the build directory.
+#
+%-print.pdf: %.pdf
+	@announce "Generating $@ (print)"
+	@cp $< $(BUILD_DIR)/$@
+
 
 ################################################################################
 #