Some results of desultory collecting of insects in Kansas and ColoradoPublished in Kansas University Science Bulletin, in 1907, in volume 4, pages 51-112Invertebrate Paleontology of the Upper Permian Red beds of Oklahoma and the Panhandle of TexasPublished in Kansas University Science Bulletin, in 1907, in volume 4, issue 3, pages 115-171
Invertebrate Paleontology of the Upper Permian Red beds of Oklahoma and the Panhandle of TexasPublished in Kansas University Science Bulletin, in 1907, in volume 4, issue 3, pages 115-171