005400a00a22002050004500020001800000245002400018100003600042100002300078100002400101100002700125260006800152260000900220300001300229440001400242082001400256306002400270760001900294015001100313887001000324  a955-9021-13-3  aOccupational Health  aEd:De Alwis Seneviratne, Rohini  aHerath, H.M.S.S.D.  aFernando, Dulitha N  aLankatilake, Kantha N   bSri Lanka:Department of Community Medicine, Faculty of Medicine  c1998  a1-151pgs  aHand book  a613.6 O11  aOccupational Health  bNo. 1 cupboard  a003887  a150/=