A Study of the Incubation Periods of Birds - what Determines Their Lengths? by W H Bergtold

Authors

J. Grinnell

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Recommended Citation

Grinnell, J. (1918) "A Study of the Incubation Periods of Birds - what Determines Their Lengths? by W H Bergtold," Condor: Vol. 20 : Iss. 2 , Article 20.
Available at: https://digitalcommons.usf.edu/condor/vol20/iss2/20