TY - BOOK AU - Trehan, Keshav AU - TI - Biotechnology U1 - 57:6 PY - 1990/// CY - New Delhi PB - Wiley Eastern KW - biotechnollogy KW - Biotechnology KW - Genetic engineering KW - Chemical engineering KW - Microbiology N1 - Ref. at the end of each chap ER -