Books by Howard R. Schwalb
Paleozoic geology of the New M
Paleozoic geology of the New Madrid area
Oil and gas in Butler County,
Oil and gas in Butler County, Kentucky
Catalog of Devonian and deeper
Catalog of Devonian and deeper wells in western Kentucky
Paleozoic geology of the Jacks
Paleozoic geology of the Jackson Purchase Region, Kentucky, with reference to petroleum possibilities
The Geneva (Middle Devonian) dolomite in Illinois
Short papers on geologic subjects