Eicher, D. L. (1960). Stratigraphy and micropaleontology of the Thermopolis Shale. Bulletin of the Peabody Museum of Natural History, Yale University. 15: 1-126.
332108
Eicher, D. L.
1960
Stratigraphy and micropaleontology of the Thermopolis Shale
Bulletin of the Peabody Museum of Natural History, Yale University