004100a00a22001690004500245005200000250001600052260004000068260000900108300001300117082001900130306001800149306000800167306002400175760001900199015001100218887001100229  aEncyclopaedia of Occupational Health and Safety  aVol. 1, A-K  bGeneva: International Labour Office  c1972  a1-753pgs  a613.6(03) E51a  aEncyclopaedia  aILO  aOccupational Health  bNo. 1 cupboard  a000383  a350/15