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Some Eocene insects from Colorado and Wyoming
Date:
1921
Citation:
Cockerell, Theodore D. A. 1921. "Some Eocene insects from Colorado and Wyoming." Proceedings of the United States National Museum. 59 (2358):29–39, 9 figs., 1 pl.. https://doi.org/10.5479/si.00963801.59-2358.29
