Index: doc/bibliography/pl.bib
===================================================================
--- doc/bibliography/pl.bib	(revision 9fe46e68c7c11e1e26647f1455b8bf2769c9b8e4)
+++ doc/bibliography/pl.bib	(revision d078afd321a2bcee7aa03836fda5824f0ec823b5)
@@ -2300,4 +2300,20 @@
 }
 
+@article{Ritchie93,
+    keywords	= {C, history},
+    contributer	= {pabuhr@plg},
+    author	= {Ritchie, Dennis M.},
+    title	= {The Development of the {C} Language},
+    journal	= sigplan,
+    volume	= 28,
+    number	= 3,
+    month	= mar,
+    year	= 1993,
+    pages	= {201--208},
+    url		= {http://doi.acm.org/10.1145/155360.155580},
+    publisher	= {ACM},
+    address	= {New York, NY, USA},
+} 
+
 @article{design,
     keywords	= {Smalltalk, designing classes},
@@ -2307,5 +2323,7 @@
     journal	= joop,
     year	= 1988,
-    volume	= 1, number = 2, pages = {22-35},
+    volume	= 1,
+    number	= 2,
+    pages	= {22-35},
     comment	= {
 	Abstract classes represent standard protocols.  ``It is better to