by University of Nebraska (Lincoln campus). Conservation and Survey Division , Nebraska Geological Survey
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Soil survey of Perkins County, Nebraska
Ground water in the Republican River bas...
Soil survey of Nance County, Nebraska
Wonderful Life the Burgess
Quaternary of South America and Antarcti...
The old red sandstone
La terre avant de déluge
Fauna of the Vale and Choza
An introduction to historical geology