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1by Burchett, Raymond R.“...Nebraska Geological Survey, Conservation and Survey Division, Institute of Agriculture and Natural...”
Published 1977
Book -
2by Carlson, Marvin“...Nebraska Geological Survey, Conservation and Survey Division Institute of Agriculture and Natural...”
Published 1989
Book -
3by Pabian, Roger K.“...Conservation and Survey Division, Institute of Agriculture and Natural Resources, University...”
Published 1993
Government Document Book