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Non-marine mollusks and two new species of Pisidium from the Tongue River Formation (Paleocene), North Dakota
Vol 87, Page 13, Date 1973
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Spread of Melanoides tuberculata
Vol 87, Page 29, Date 1973
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Oxyloma deprimida, a new species of Succineidae (Pulmonata)
Vol 87, Page 66, Date 1973
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Acteon eloiseae, a new opisthobranch from Arabia
Vol 87, Page 91, Date 1973