http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Geology and ground-water resources of the upper Niobrara River Basin, Nebraska and Wyoming
with a section on Chemical quality of the ground water
1 online resource (iv, 70 pages, 1 page of plates) : illustrations, maps.
"Prepared as part of the program of the Department of the Interior for the development of the Missouri River Basin."
Includes bibliographical references and index.
Geological Survey water-supply paper ; 1368