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CLAUSEN, J., D.D.KECK and W.M.HIESEY: Experimental studies on the nature of species, 4: Biosystematics, genetics, and physiological ecology of the erythranthe sections of Mimulus, by W.M.Hiesey, M.A.Nobs and O.Bjoerkman. 1971. 73 figs. VI,213 p. gr8vo. Cloth. (2670) 27.82
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