Geology and mineral resources of Fayette County, PennsylvaniaWilliam Orville Hickok · First published 1940Open the Tome
The minerals of Pennsylvania: Iron ores of PennsylvaniaWilliam Orville Hickok · First published 1939Open the Tome
A b rief description, and a few plain statements concerning a gold property located on the Topeka, Junction, Frank, Ohio, Pacific, and other well known lodes, situated in Russell Mining District, Gilpin County, Colorado TerritoryWilliam Hickok · First published 1865Open the Tome
