Added link to xdrlib module in "See also" section.
diff --git a/Doc/lib/libstruct.tex b/Doc/lib/libstruct.tex
index 453fa20..101762d 100644
--- a/Doc/lib/libstruct.tex
+++ b/Doc/lib/libstruct.tex
@@ -169,5 +169,6 @@
 standard size and alignment does not enforce any alignment.
 
 \begin{seealso}
-\seemodule{array}{packed binary storage of homogeneous data}
+  \seemodule{array}{packed binary storage of homogeneous data}
+  \seemodule{xdrlib}{packing and unpacking of XDR data}
 \end{seealso}