Submission + - Government Declassifies Worldwide Survey of Biological Warfare (governmentattic.org)
The same website has also published a Thesaurus of Biological Warfare terminology http://www.governmentattic.org/docs/BW-Database-Thesaurus_DNA_1993.pdf
and a listing of pre-1946 reports on biological and chemical warfare from the Army.
http://www.governmentattic.org/5docs/DPG-WDTIC-Reports_1917-1945.pdf