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The Seventy-Five Per Cent Rule for Subspecies

Dean Amadon
The Condor
Vol. 51, No. 6 (Nov. - Dec., 1949), pp. 250-258
DOI: 10.2307/1364805
Stable URL: http://www.jstor.org/stable/1364805
Page Count: 9
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The Seventy-Five Per Cent Rule for Subspecies
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