00388nam a2200133 a 450000500170000002000150001708200160003210000130004824500760006125000120013726000600014930000260020950000190023520251203091418.0  a0632013184  a660.65bOLD  aOld, R.W  aPrinciples of gene manipulation: an introduction to genetic engineering  a3rd ed.  aCambridebBlackwell Scientific Publicationsc1980-R1987  axiii,409p.c22cm.bPB  aincludes index