00287    a2200109   4500020001500000082001500015100002000030245001900050260006900069300002100138650001800159  a8122401295  a660.6bTRE  aTrehan, Keshav   aBiotechnology   aNew DelhibNew Age International Limited, Publishersc1990g1990  aviii,286p.c24cm  aBiotechnology