Added codecs entry here as part of String Services.
diff --git a/Doc/lib/lib.tex b/Doc/lib/lib.tex
index 2750984..549acdc 100644
--- a/Doc/lib/lib.tex
+++ b/Doc/lib/lib.tex
@@ -113,6 +113,7 @@
 \input{libstruct}
 \input{libfpformat}
 \input{libstringio}
+\input{libcodecs}
 %\input{libsoundex}
 
 \input{libmisc}			% Miscellaneous Services