TY - BOOK AU - Cutler,D.Ward AU - rev. by Pask, S.R.B. TI - Evolution, Heredity, and Variation U1 - 575 23 PY - 1949/// CY - London PB - Christophers KW - Evolution KW - Genetics KW - Variation (Biology) N1 - Bibliography: p. 141-143 & Index ER -