00911cam a22003131 4500 2175841 BD-DhUL 20140811111907.0 700928s1968 njua b 000 0 eng 68020871 691079595 691080623 DLC DLC DLC BD-DhUL QL752 .L4 301.3 LEE Levins, Richard. Evolution in changing environments; some theoretical explorations. Princeton, N.J., Princeton University Press, 1968. ix, 120 p. illus. 23 cm. 6.50 Monographs in population biology, no. 2 Bibliography: p. 113-116. Animal populations. Animal population genetics. Evolution. Ecology. 7 cbc orignew u ncip 19 y-gencatlg ddc BK 1716 1716 0 0 ddc 0 301_300000000000000_LEE 0 NFIC 2924 DUSL DUSL GEN 1975-12-26 Purchase 0.00 301.3 LEE A116171 2014-08-11 1 2014-08-11 BK