Ridgway on New Forms of Swifts and Hummingbirds

Authors

J. A. Allen

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Recommended Citation

Allen, J. A. (1910) "Ridgway on New Forms of Swifts and Hummingbirds," The Auk: Vol. 27: Iss. 3, Article 33.
Available at: https://digitalcommons.usf.edu/auk/vol27/iss3/33