Ammonites and some characteristic bivalves from the Upper Cretaceous Frontier Formation, Natrona County, Wyoming /
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| Format: | Government Document Book |
| Language: | English |
| Published: |
[Reston, Va.?] : Denver, CO :
Dept. of the Interior, U.S. Geological Survey ; For sale by the Books and Open-File Reports Section,
1990
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| Series: | Evolution of sedimentary basins--Powder River Basin ;
ch. B U.S. Geological Survey bulletin ; 1917-B |
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