Meek, F.B. (1875). Note on some fossils from near the eastern base of the Rocky Mountains, west of Greeley and Evans, Colorado, and others from about two hundered miles farther eastwards, with descriptions of a few new species. Bulletin of the United States Geological and Geographical Survey of the Territories, second series. 1: 39-47.
366575
Meek, F.B.
1875
Note on some fossils from near the eastern base of the Rocky Mountains, west of Greeley and Evans, Colorado, and others from about two hundered miles farther eastwards, with descriptions of a few new species
Bulletin of the United States Geological and Geographical Survey of the Territories, second series