Tag Archives: Fossiliferous Zones of the Upper Pennsylvanian of Vermilion and Edgar Counties

[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 035-54-print  

Posted in 1942, Transactions | Tagged , , | Leave a comment