The fauna of the Keyser member of the Helderberg formation in Maryland /
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| Format: | Thesis Book |
| Language: | English |
| Published: |
Baltimore :
Johns Hopkins Press,
1913.
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| Item Description: | Life. "All references to figures are to the Lower Devonian report of the Maryland Geological Survey in which the plates and text were published." |
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| Physical Description: | 52 pages : 1 . ; 26 cm. |