Index: doc/bibliography/pl.bib
===================================================================
--- doc/bibliography/pl.bib	(revision 507e7a25c43d01f94faa1f5f24b309ae36bd70d6)
+++ doc/bibliography/pl.bib	(revision 79d4186e1b45bad34ec6e2ad7a550f82989a8732)
@@ -1439,10 +1439,10 @@
     contributer	= {pabuhr@plg},
     author	= {Peter A. Buhr},
-    title	= {$\mu${C}{\kern-.1em\hbox{\large\texttt{+\kern-.25em+}}} Annotated Reference Manual, Version 6.1.0},
+    title	= {$\mu${C}{\kern-.1em\hbox{\large\texttt{+\kern-.25em+}}} Annotated Reference Manual, Version 7.0.0},
     institution	= {School of Computer Science, University of Waterloo},
     address	= {Waterloo, Ontario, Canada, N2L 3G1},
-    month	= jul,
-    year	= 2015,
-    note	= {\href{http://plg.uwaterloo.ca/~usystem/pub/uSystem/u++-6.1.0.sh}{http://\-plg.\-uwaterloo.\-ca/\-$\sim$usystem/\-pub/\-uSystem/\-u++-6.1.0.sh}},
+    month	= dec,
+    year	= 2017,
+    note	= {\href{http://plg.uwaterloo.ca/~usystem/pub/uSystem/u++-7.0.0.sh}{http://\-plg.\-uwaterloo.\-ca/\-$\sim$usystem/\-pub/\-uSystem/\-u++-7.0.0.sh}},
 }