External quality-assurance results for the National Atmospheric Deposition Program/National Trends Network during 1989
By: by Timothy C. Willoughby ... [et al.].
Contributors: Willoughby, Timothy C.; Geological Survey (U.S.)
Series: Water resources investigations report -- 91-4039.; Water-resources investigations report -- 91-4039.
Publisher: U.S. Dept. of the Interior, U.S. Geological Survey; Books and Open-File Reports Section [distributor]
Published: 1991
Place of publication: Denver, Colo
Language: eng
Number of pages: 26
Subjects: National Atmospheric Deposition Program (U.S.); Acid deposition -- United States.
Other titles: External quality assurance results for the National Atmospheric Deposition Program/National Trends Network during 1989.
Notes: Shipping list no.: 91-791-P.

Includes bibliographical references (p. 26).