What you should know about biological warfare;
the official U.S. Government booklet.

APA Citation

United States. Federal Civil Defense Administration. (1951). What you should know about biological warfare: the official U.S. Government booklet. [Washington, D.C.: U.S. Govt. Print. Off..

MLA Citation

United States. Federal Civil Defense Administration. What You Should Know About Biological Warfare: the Official U.S. Government Booklet. [Washington, D.C.: U.S. Govt. Print. Off., 1951.

Warning: These citations may not always be complete (especially for serials).