00496    a2200157   4500020001500000082001300015100002200028245007400050260004300124300001800167440006100185650002700246650001200273700002700285700002600312  a9552307074  a579bCOO  aCoomaraswamy, Uma  aMicrobiology of foodbenvironmental and applied microbiology unit 111  aSri LankabOpen Universityc1998g1988  aix,92p.c28cm  aFaculty of natural sciences bachelor of science: level 5  aGenetics and evolution  aBiology  aDurairatnam, Sakuntala  aJayawardene, Sarojini