The Third Man script.  This script contains lines which were improvised during shooting.  To see the pre-production script, see the Sight and Sound screenplay where improvised lines are in square brackets (791.437 T445g.1).  Casablanca DVD "Chapter Titles" and MLA citation format.  Casablanca shooting script  Click here for the cast members of Casablanca and parts they played, as well as the shooting crew, director and other personnel.       

The following URLs contain still images from the movie which may aid your shot analysis: http://bogart-tribute.net/films/casablanca.shtml (has annoying soundtrack--press "Mute" if you're in a public place); http://www.reelclassics.com/Movies/Casablanca/casablanca-credits.htm (contains "studio publicity shots" which do not come from the movie--be careful!); http://www.imdb.com/title/tt0034583/mediaindex?page=1 (only the first page contains shots from the film and this one also includes publicity shots not from the movie).