Clinton sandstone papers presented at the Ohio Oil and Gas Association Winter Meetings 1961 to 1978

(abridged reprint of 1980 volume). 228 p., 1985. $25.00 (M: $20.00)

Seminar on Industrial Self-Help Programs for Natural Gas Supplies

edited by Arie Janssens. 55 p., 15 figs., 1 table, 1977. Out of print.

Geology of Silurian Rocks, Northwestern Ohio

by C. F. Kahle and J. C. Floyd. Guidebook for First Annual Meeting, Eastern Section, American Association of Petroleum Geologists. 91 p., 1970. Out of print.

Guidebook to the Middle Devonian rocks of North-Central Ohio

by A. Janssens. 30 p., 1970. Out of print.