00318nam a2200121 a 450000500170000000800410001704100080005808200110006610000170007724500470009426400440014130000110018520260717091445.0260717s1993    ii            000 0 eng d  aeng04a660.621 aDubey, R. C.12aA texbook of biotechnology /cDubey, R. C. 1aNew Delhi :bS.Chand & Company.,c1993.  a290 p.