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The Reality of Bird Species
You can always find the topics here!Topics: Species, Bird songs, Geographical variation, Sea birds, Birds, Hawks, Genetic hybridization, Reality
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Notes and References
This item contains 3 references.
1Riverside Nat. Hist., Vol. IV, pp. 8, 9.
1Faxon, Mem. Mus. Comp. Zool., Vol. XL, 1911, pp. 57-78.
2Proc. Calif. Acad. Sci., 4th Ser., Vol. II, Pt. II, 1918, p. 88.