Surface water quality, Twin Ponies watershed, Pottawattamie and Mills Counties, Iowa
By: by Mark G. Detroy ; prepared in cooperation with the U.S. Soil Conservation Service
Contributors: Geological Survey (U.S.); United States. Soil Conservation Service
Series: Open-file report -- 81-679; Open-file report (Geological Survey (U.S.)) -- 81-679
Publisher: U.S. Dept. of the Interior, Geological Survey; For sale by Open-File Services Section, U.S. Geological Survey
Published: 1981
Place of publication: Iowa City, Iowa; Denver, Colo
Language: eng
Format: Microform
Subjects: Water quality -- Iowa -- Pottawattamie County; Water quality -- Iowa -- Mills County
Notes: Microfiche. [Denver, Colo. : U.S. Geological Survey, 1981?]. 1 microfiche ; 11 x 15 cm

Bibliography: leaf 26