12 books • 1 series
Classification of the Pennsylvanian Rocks of Illinois as of 1956; Illinois State Geological Survey Circular 217
Structure of Herrin (no. 6) Coal Bed in Marion and Fayette Counties and Adjacent Parts of Bond, Clinton, Montgomery, Clay, Effingham, Washington, Jefferson, and Wayne Counties
Petrology and Sedimentation of Upper Chester Sandstones; Report of Investigations No. 170
The Mississippian-Pennsylvanian Unconformity in Southern Illinois; Report of Investigations No. 152
Petrology and Sedimentation of Upper Chester Sandstones
Under Earth 4e&sg&investiga Booklet
Under Earth 4e&earth Inq Booklet
Understanding Earth & CD-ROM & Study Guide & Earth Issues Reader
Understand Earth 3e & CD-ROM & Study GUI
Understanding Earth
Sand (Scientific American Library, No 24)
Earth