diff -r f4fe75218cec -r 0260bdba4dd7 src/Doc/Logics/document/preface.tex
--- a/src/Doc/Logics/document/preface.tex	Sun Jul 07 18:50:16 2013 +0200
+++ b/src/Doc/Logics/document/preface.tex	Sun Jul 07 20:23:09 2013 +0200
@@ -8,8 +8,7 @@
 an extensive library of (concrete) mathematics, and various packages for
 advanced definitional concepts (like (co-)inductive sets and types,
 well-founded recursion etc.). The distribution also includes some large
-applications.  See the separate manual \emph{Isabelle's Logics: HOL}.  There
-is also a comprehensive tutorial on Isabelle/HOL available.
+applications.
 
 \texttt{ZF} provides another starting point for applications, with a slightly
 less developed library than \texttt{HOL}.  \texttt{ZF}'s definitional packages