A specimen of "Crassatellites" from the St. Marys formation of Maryland
| Autor: | Mansfield, W. C. |
|---|---|
| Zdroj: | Journal of the Washington Academy of Sciences, 1937 Feb . 27(2), 56-57. |
| Databáze: | JSTOR Journals |
| Externí odkaz: |
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| Autor: | Mansfield, W. C. |
|---|---|
| Zdroj: | Journal of the Washington Academy of Sciences, 1937 Feb . 27(2), 56-57. |
| Databáze: | JSTOR Journals |
| Externí odkaz: |
|