00748nam a2200217 4500 0011742 20260608202722.0 260224s1978 xxu 620.86 P497 0011742 Guide to safe stairways, walkways, and railings Austin, Texas Petroleum Extension Service 1978 07/09/06 ; 28/06/2006 14 p. LIBRO Petroleum Extension Service 24109 International Association of Drilling Contractors, IADC 4807 Seguridad en perforación de pozos 20659 International Association of drilling contractors, IADC 4813 152683 152683 0 0 0 0 220502 BAAB BAAB 620.86 P497 0011742 2026-03-05 200028767 0 620.86 P497 0011742 200028767 2026-03-05 00:32:43 2026-03-05 Libro