Model Code of Safety Regulations for underground work in coal mines  [Recurso electrónico]  

, Servicio en línea 
 - Geneva :  International Labour Organization, represented by the International Labour Office (ILO),    1950 
 - 1 Recurso electrónico 
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<br/><br/><label>Subjects--Topical Terms: </label><br/>Derecho laboral y Seguridad Social<br/>Seguridad y salud laboral