Here\'s some neat history links from The ALA.
1930 Suggested Code of Ethics from American Library Association Bulletin
1939 Code of Ethics for Librarians
1975 and 1979 Drafts from American Libraries
1981 Statement on Professional Ethics
1995 ALA Council Actions
Code of Ethics of the American Library Association, Adopted by the ALA Council, June 28, 1995
Librarian And Information Science News