hartwick, J. M. (1989). Non-Renewable resources extraction programs and markets. Harwood academic Pub.
Chicago Edition Citationhartwick, John M. Non-Renewable Resources Extraction Programs and Markets. Chur: Harwood academic Pub, 1989.
MLA Edition Citationhartwick, John M. Non-Renewable Resources Extraction Programs and Markets. Harwood academic Pub, 1989.
Warning: These citations may not always be 100% accurate.