American Species of Operculina and Heterostegina and their Faunal Relations and a new Species of Orthophragmina from Louisiana /
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| Typ dokumentu: | Kniha |
| Jazyk: |
angličtina |
| Vydavatel: |
Washington :
Government Printing Office,
1921.
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| Edice: |
Professional paper [of] U.S. Geological Survey ;
128-E |
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