Author
Geological Survey (U.S.)
3
Kansas Geological Survey
Missouri. Division of Geology and Land Survey
2
Berendsen, Pieter
1
Blair, Kevin P.
1
Cordell, Lindrith
1
Iowa Geological Survey
1
Lee, Wallace, 1883-1972
1
McCafferty, Anne
1
Missouri. Division of Geological Survey and Water Resources
1
Nebraska Geological Survey
1
Seeger, Cheryl M.
1