00351nam a2200133 a 450000500170000002000150001708200160003210000060004811000170005424500780007126000300014930000210017971000170020020251203091737.0  a8120404955  a660.62bGEN  d_  aChopra, V.L.  aGenetic engineering and biotechnology : concepts, methods and application  aDelhibOxford & IBHc1990  aviii, 200p, 22cm  aNasim, Anwar