00466nam a22001577a 450000100060000000300100000600500170001604000140003300800410004702000180008811000680010624500560017426000420023030000100027265000260028215607MX-SIABUC20260702204730.0  aMX-SIABUC050529s1976    sz x   j            eng d  a92-2-101335-9 2aInternational Labour Organisation (8a. : 1976 : Ginebra, Suiza)0 aThe chemical industries and the working environment4 aGeneve :bInternational Labour Office4 a78 p.  a1.DERECHO DEL TRABAJO