Good website regarding 16mm film stocks and how to id: http://www.paulivester.com/films/filmstock/guide.htm
AMIA the assoc of moving image archivists site with lots of good info including a date code chart:
http://www.amianet.org/resources/guidelinesnologin.php?accesscheck=/resources/guidelines.php
Here's another source with some differences especially for Canada (also in pdf in LHF procedures film info folder):
http://www.filmforever.org/Edgecodes.pdf
Another date code source:
http://historicphotoarchive.com/f1/16ekcode.html
Very good info on multiple types of film and how to id the dates:
http://www.brianpritchard.com/Date%20Codes.htm
Here's another blog with several edge code tables:
http://www.film-tech.com/ubb/f1/t011524.html