Added \label{} for logical addressing.
diff --git a/Doc/librestricted.tex b/Doc/librestricted.tex
index 9786cf0..55936ac 100644
--- a/Doc/librestricted.tex
+++ b/Doc/librestricted.tex
@@ -1,4 +1,5 @@
 \chapter{Restricted Execution}
+\label{restricted}
 
 In general, Python programs have complete access to the underlying
 operating system throug the various functions and classes, For