Biodiversity Heritage Library
By "Oklahoma Geological Survey. "
Animal and plant life in Oklahoma,
By: Oklahoma Geological Survey. - Cross, Howard. - Shannon, Charles William, - Stevens, George Walter.
Publication info: Norman,1917.
Holding Institution: Cornell University Library
Geology of a portion of northeastern Oklahoma. Paleontology of the Chester Group in Oklahoma /
By: Snider, Luther C. (Luther Crocker), - Oklahoma Geological Survey.
Publication info: Norman :[University of Oklahoma?],1915.
Holding Institution: University of British Columbia Library (archive.org)