Description of data files compiled for the Central Midwest Regional Aquifer-System Analysis
By: by John O. Helgesen and Cristi V. Hansen
Contributors: Hansen, Cristi V; Geological Survey (U.S.)
Series: U.S. Geological Survey open-file report -- 89-42
Publisher: Dept. of the Interior, U.S. Geological Survey; Books and Open-File Reports [distributor]
Published: 1989
Place of publication: Denver, Colo
Language: eng
Format: Microform
Subjects: Groundwater -- Middle West; Hydrology -- Middle West; Aquifers -- Middle West
Notes: Includes bibliographical references (p. 28)