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The Adaptive Basis of Geographic Variation in Color of the Purple Martin

Richard F. Johnston
The Condor
Vol. 68, No. 3 (May - Jun., 1966), pp. 219-228
DOI: 10.2307/1365555
Stable URL: http://www.jstor.org/stable/1365555
Page Count: 10
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The Adaptive Basis of Geographic Variation in Color of the Purple Martin
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