00387nam a2200145Ia 4500008004100000020001500041082001700056100002000073245003000093260004800123300000800171650001800179650001800197653002600215170901s1967    xx            000 0 und d  a0697045064  a574.13bK50P  aKerr, Norman S. 0aPrinciples of Development  aIowabWM. C. Brown Company Publishersc1967  a115  aLife sciences  aPure Sciences  aDevelopmental biology