003220000a22001330004500060000800000082001400008100002100022100001600043245001800059260003500077260000900112300000800121650005900129  a100  a575.1 SAG  aRyan,  Francis J  aSager, Ruth  aCell heredity  aNewYork, John Wiley & Sons INC  c1961  a417  aGenetics/ Heredity/ Mutation/ Chromosome/ Microbiology