002860000a22001210004500060000800000082001400008100002000022245003900042260002900081260000900110300000800119650003700127  a100  a575.1 MAT  aMather, Kenneth  aMeasurement of Linkage in heredity  aLondon, Methuen & co Ltd  c1957  a149  aGenetics/ Linlkage/ segregation/