Yen, T.-C. (1946). On Lower Cretaceous Fresh-Water Mollusks of Sage Creek, Wyoming. Notulae Naturae of The Academy of Natural Sciences of Philadelphia. 166: 1-13.
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Yen, T.-C.
1946
On Lower Cretaceous Fresh-Water Mollusks of Sage Creek, Wyoming
Notulae Naturae of The Academy of Natural Sciences of Philadelphia