00445nam a2200169Ia 4500008004100000082001700041100001700058245004000075250000600115260005200121300000800173650001800181650001800199653001800217653002200235700001800257170901s1988 xx 000 0 und d a574.88bW13M aWalker, J.M. 0aMolecular Biology and Biotechnology a2 aNew DelhibPanima Educational Book Agencyc1988 a434 aLife sciences aPure Sciences aBiotechnology aMolecular biology aGingold, E.B.