TY  - RPRT
TI  - Nonmarine mollusks of Late Cretaceous age from Wyoming, Utah, and Colorado
AU  - Teng-Chien Yen
PY  - 1954
DO  - 10.3133/pp254b
UR  - https://pubs.usgs.gov/publication/pp254B
ID  - pp254B
ER  -