--- a/text/intro.tex	Sat Aug 28 17:34:20 2010 -0700
+++ b/text/intro.tex	Mon Aug 30 08:54:01 2010 -0700
@@ -411,7 +411,7 @@
 \]
 \end{thm:product}
 The statement can be generalized to arbitrary fibre bundles, and indeed to arbitrary maps
-(see \S \ref{moddecss}).
+(see \S \ref{ss:product-formula}).
 
 Fix a topological $n$-category $\cC$, which we'll omit from the notation.
 Recall that for any $(n-1)$-manifold $Y$, the blob complex $\bc_*(Y)$ is naturally an $A_\infty$ category.