Bergtold, 1917

Bergtold, William Harry. A Study of the Incubation Periods of Birds; What Determines Their Lengths,. Denver, Col.: Kendrick-Bellamy, 1917.

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Author William Harry Bergtold
Maintainer Sarah Miller
Last Updated August 28, 2020, 12:11 (America/New_York)
Created September 14, 2017, 07:22 (America/New_York)