Standard reference materials.
Price and availability list.

APA Citation

United States. National Bureau of Standards., National Measurement Laboratory (U.S.). Office of Standard Reference Materials. (1971). Standard reference materials. [Washington, D.C.]: U.S. Dept. of Commerce, National Bureau of Standards.

MLA Citation

United States. National Bureau of Standards, and National Measurement Laboratory (U.S.). Office of Standard Reference Materials. Standard Reference Materials. [Washington, D.C.]: U.S. Dept. of Commerce, National Bureau of Standards, 1971.