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| Utgitt
| New York : Academic Press , 1981
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| Omfang
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| Opplysninger
| "Proceedings of the third annual Spring Systematics Symposium: Biotic Crises in Ecological and Evolutionary Time, held at the Field Museum of Natural History, Chicago, Illinois, May 10, 1980, sponsored by the Field Museum of Natural History and the National Science Foundation."
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| ISBN
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