Environmental.
Contributors: National Institute of Standards and Technology (U.S.)
Series: Standard reference materials
Publisher: U.S. Dept. of Commerce, National Institute of Standards and Technology
Published: 1990
Place of publication: Gaithersburg, MD
Language: eng
Number of pages: 11
Subjects: Pollution -- Environmental aspects -- United States.; Pollution -- United States -- Measurement.
Notes: Shipping list no.: 90-189-P.

"January 1990"--P. [11].