Merge pull request #43 from softdevteam/fix_gudeman

This is a techreport, not a book.

Author: Jake

softdev.bib

@@ -2140,9 +2140,9 @@ @inproceedings{barany2014python
     doi = {10.1145/2617548.2617552},
 }
 
-@book{gudeman1995representing,
+@techreport{gudeman1995representing,
     title = {Representing type information in dynamically typed languages},
-    booktitle = {Technical Report TR93-27},
+    number = {TR 93-27},
     author = {Gudeman, David},
     year= {1995},
     month = Oct,