[035-54]Fossiliferous Zones of the Upper Pennsylvanian of Vermilion and Edgar Counties, Illinois

Wilson, Geo. M.

Fossiliferous Zones of the Upper Pennsylvanian of Vermilion and Edgar Counties, Illinois

Recent Advances in Spectroscopy* Author: Michelson, A.A.

Farm Water Supply Author: Bartow, Edward

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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Recent Advances in Spectroscopy* Author: Michelson, A.A.

Farm Water Supply Author: Bartow, Edward

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