00549cam a22002174a 4500003001000000005001700010008004100027020001500068040002500083041000800108044000700116080000800123100002300131245003900154260004800193300001100241500001100252650002900263650002000292655001900312AR-SsjUIB20250710145600.0250429s1983 gw 000 0 eng d a0878490418 aAR-SsjUIBcAR-SsjUIB0 aeng agw a6221 aTrotter, Donald A.14aThe lighting of underground mines. aAlemania :bTrans Tech Publications,c1983. a201 p. aLIFBI. 7aMinasxILUMINACION2lemb 7aMinería2lemb 7aLibro2unescot