004160a00a22001690004500245005200000250001900052260004000071260000900111300001600120082001900136306001800155306000800173306002400181760001900205015001100224887001100235  aEncyclopaedia of Occupational Health and Safety  aVol. 1I, L - Z  bGeneva: International Labour Office  c1972  a755-1621pgs  a613.6(03) E51b  aEncyclopaedia  aILO  aOccupational Health  bNo. 1 cupboard  a000395  a350/15