Roth, B.; Emberton, K. C. (1994). "Extralimital" Land Mollusks (Gastropoda) from the Deep River Formation, Montana: Evidence for Mesic Medial Tertiary Climate. Proceedings of the Academy of Natural Sciences of Philadelphia. 145: 93-106.
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Roth, B.; Emberton, K. C.
1994
"Extralimital" Land Mollusks (Gastropoda) from the Deep River Formation, Montana: Evidence for Mesic Medial Tertiary Climate
Proceedings of the Academy of Natural Sciences of Philadelphia