00779cam a22002531  45000010008000000030008000080050017000160080041000330100017000740350019000910400033001100420012001430500017001550820015001721000044001872450062002312600051002933000039003444900033003835040032004166500014004486500024004627400039004868779756BD-DhUL20141209083648.0770805s1939    enka     b    000 0 eng    a   39015696   a(OCoLC)3164500  aDLCcOCdOCoLCdDLCdBD-DhUL  apremarc00aQH431b.D212  a575.1bDAE1 aDarlington, C. D.q(Cyril Dean),d1903-04aThe evolution of genetic systems,cby C.D. Darlington ...  aCambridge [Eng.]bThe University Press,c1939.  ax p., 1 l., 149 p.billus.c22 cm.0 aCambridge biological studies  aBibliography: p. [135]-138. 0aHeredity. 0aVariation (Biology)0 aGenetic systems, The evolution of.