[049-07]The Gravel-Hill Prairies of Rock River Valley in Illinois

Fell, Egbert W. and Fell, George B.

The Gravel-Hill Prairies of Rock River Valley in Illinois

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[01-18] The Relation of the State Academy of Science to the Natural History Surrounding the Chicago Academy of Sciences

The Relation of the State Academy of Science to the Natural History Surrounding the Chicago Academy of Sciences Author: Baker, F.C.

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