Gaya APA

Co, S, C, M. (1975). Rehabilitation and Expansion Plants of Ombilin Coal Mine Vol.ll Proposal on Improvement for Rehabilitation . : Sumitomo Coal Mining CO. LTD..

Gaya MLA

Co, Sumitomo, Coal, Mining. "Rehabilitation and Expansion Plants of Ombilin Coal Mine Vol.ll Proposal on Improvement for Rehabilitation". : Sumitomo Coal Mining CO. LTD., 1975. Text.