00648cam a22002414a 4500 EM-000616 AR-SsjUBGM 20250619152852.0 250228s1989 xxu 000 0 eng d 0873350820 AR-SsjUBGM AR-SsjUBGM eng xxu 622.4(063) Mc Pherson, Malcolm 4717 Proceedings of the 4th US Mine Ventilation Symposium. California : Society for Mining, 1989. 609 p. : il. ; 28 cm Ventilación de minas 4718 Libro 14 LB cdu dbem 2004-02-04 7770 7770 0 0 cdu 1 0 0 EM EM EMC 2003-11-21 Donación - Raúl Panighi 4164 0 622.4(063) MCP EM-4164 2025-04-05 00:00:00 2025-04-05 LB