00579cam a22002051a 4500001001300000003000400013005001700017008004100034010001700075035001900092040001900111042001200130050001600142100003700158245009500195260003200290300002000322650001400342999001700356ca 23000354 DLC20260227111111.0810902s1923    nyua          000 0 eng    aca 23000354   a(OCoLC)7722933  aDLCcOrPRdDLC  apremarc00aQH431b.M831 aMorgan, Thomas Hunt,d1866-1945.10aLaboratory directions for an elementary course in genetics /cby T. H. Morgan ... [et al.]  aNew York :bH. Holt,c1923.  a16 p. ;c24 cm. 0aHeredity.  c15691d15691