Standard samples issued or in preparation by the National Bureau of Standards.

APA Citation

United States. National Bureau of Standards. (1942). Standard samples issued or in preparation by the National Bureau of Standards. [Washington, D.C.: U.S. G.P.O..

MLA Citation

United States. National Bureau of Standards. Standard Samples Issued Or In Preparation by the National Bureau of Standards. [Washington, D.C.: U.S. G.P.O., 1942.

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