00334nam a2200121 a 450000500170000000800410001704100080005808200110006610000170007724500470009426400440014130000270018520260717091438.0260717s1993    ii            000 0 eng d  aeng04a660.621 aSingh, R. B.10aIntroductory biotechnology /cSingh, R. B. 1aAllahabad :bCentral Book Depot,c1993.  a390 p. : ill. ; 23 cm.