diff --git a/Doc/lib/libamoeba.tex b/Doc/lib/libamoeba.tex
index 10059ee..d471f35 100644
--- a/Doc/lib/libamoeba.tex
+++ b/Doc/lib/libamoeba.tex
@@ -1,8 +1,9 @@
 \chapter{Amoeba Specific Services}
 
 \section{Built-in Module \sectcode{amoeba}}
-
+\label{module-amoeba}
 \bimodindex{amoeba}
+
 This module provides some object types and operations useful for
 Amoeba applications.  It is only available on systems that support
 Amoeba operations.  RPC errors and other Amoeba errors are reported as
diff --git a/Doc/lib/libfcntl.tex b/Doc/lib/libfcntl.tex
index 8af4ee3..e3a4ae0 100644
--- a/Doc/lib/libfcntl.tex
+++ b/Doc/lib/libfcntl.tex
@@ -1,5 +1,6 @@
 % Manual text by Jaap Vermeulen
 \section{Built-in Module \sectcode{fcntl}}
+\label{module-fcntl}
 \bimodindex{fcntl}
 \indexii{UNIX@\UNIX{}}{file control}
 \indexii{UNIX@\UNIX{}}{I/O control}
diff --git a/Doc/lib/libkeyword.tex b/Doc/lib/libkeyword.tex
index 794a91e..b4910a6 100644
--- a/Doc/lib/libkeyword.tex
+++ b/Doc/lib/libkeyword.tex
@@ -1,4 +1,5 @@
 \section{Standard Module \sectcode{keyword}}
+\label{module-keyword}
 \stmodindex{keyword}
 
 This module allows a Python program to determine if a string is a
diff --git a/Doc/lib/libmimify.tex b/Doc/lib/libmimify.tex
index 2982755..3588dc9 100644
--- a/Doc/lib/libmimify.tex
+++ b/Doc/lib/libmimify.tex
@@ -1,4 +1,5 @@
 \section{Standard Module \sectcode{mimify}}
+\label{module-mimify}
 \stmodindex{mimify}
 \setindexsubitem{(in module mimify)}
 
diff --git a/Doc/lib/libstdwin.tex b/Doc/lib/libstdwin.tex
index 6a0b58d..b16fde6 100644
--- a/Doc/lib/libstdwin.tex
+++ b/Doc/lib/libstdwin.tex
@@ -15,6 +15,7 @@
 native toolkit interfaces for the Macintosh.
 
 \section{Built-in Module \sectcode{stdwin}}
+\label{module-stdwin}
 \bimodindex{stdwin}
 
 This module defines several new object types and functions that
@@ -776,6 +777,7 @@
 \end{verbatim}
 %
 \section{Standard Module \sectcode{stdwinevents}}
+\label{module-stdwinevents}
 \stmodindex{stdwinevents}
 
 This module defines constants used by STDWIN for event types
@@ -790,6 +792,7 @@
 \end{verbatim}
 %
 \section{Standard Module \sectcode{rect}}
+\label{module-rect}
 \stmodindex{rect}
 
 This module contains useful operations on rectangles.