Spamer, Earle E. Mollusca of the Grand Canyon and Vicinity, Arizona: New and Revised Data on Diversity and Distributions, With Notes on Pleistocene-Holocene Mollusks of the Grand Canyon / Earle E. Spamer, Arthur E. Bogan. -- 1.vyd.

In Proceedings of The Academy of Natural Sciences of Philadelphia. -- 144. (1993), s. 21-68. map.

I. Bogan, Arthur E.
II. Proceedings of The Academy of Natural Sciences of Philadelphia. -- 144. (1993), s. 21-68. map.
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