A Geologic Excursion to Fluorspar Mines in Hardin and Pope Counties, Illinois; Illinois-kentucky Mining District and Adjacent Upper Mississippi Embayment [by] James W. Baxter, James C. Bradbury [and] Norman C. Hester. Contributions on Mine Geology: Gaskins Mine [by] D B. Saxby [and] Davis-oxford Mine [by] B L. Perry.

James W Baxter; James C Bradbury; Norman C Hester; Forum on Geology of Industrial Minerals