Pennsylvanian Flora of Northern Illinois, by A. C. Noé A. C. Noé Published: 1925 Total Pages: 113 Get eBook
Report of the State Geologist California. Division of Mines and Geology Published: 1926 Total Pages: 1166 Get eBook
Bulletin - State of Illinois, Department of Registration and Education, Division of the State Geological Survey Illinois State Geological Survey Published: 1925 Total Pages: 756 Get eBook
Historical perspective of early twentieth century Carboniferous paleobotany in North America William Culp Darrah Published: 1995 Total Pages: 428 Get eBook
