00254nam a2200109 a 450000500170000002000150001708200190003210000190005124500250007026000280009530000210012320251203091055.0  a0632017643  a660.6,bD, pri  aPrimrose, S.B.  aModern biotechnology  aOxfordbBlackwellc1987  aviii, 176p, 26cm