<>/ ffit 1 l.inni'nn \ 9 .V27 ,VM.\ î ligures A decline of melanism in the peppered moth Biston betularia in The Netherlands PAUL M. BRAKLFIKLn Section oj Evolutionary Dio/ngr, Department <>J Population lîiologv, l'nnrrMty of I.eitlen.I4a, 2313 £1 I.mini.I In
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Paul M. Brakefield (1990) studied this question.
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