00380nam a2200169Ia 4500008004000000041000800040082001200048100001100060245003100071260004100102650001600143650000800159650000700167650001300174650001200187700001100199210210b1961   xxu||||| |||| 00| 0 eng d  aeng  a590/318  aWALTER  aBiology of the vertebrates  aNew YorkbThe macmilan companyc1961  avertebrates  athe  aof  aGenetics  aBiology  aSAYERS