APA

Simpson D. G., Seminar on the Role of Overburden Analysis in Surface Mining, . (1982). Proceedings of Seminar on the Role of Overburden Analysis in Surface Mining, Wheeling, W. Va., My 6-7, 1980. Washington, DC: US Dep. of the Interior, Bureau of Mines.

Chicago

Simpson David G, Seminar on the Role of Overburden Analysis in Surface Mining, . 1982. Proceedings of Seminar on the Role of Overburden Analysis in Surface Mining, Wheeling, W. Va., My 6-7, 1980. Washington, DC: US Dep. of the Interior, Bureau of Mines.

Harvard

Simpson D. G., Seminar on the Role of Overburden Analysis in Surface Mining, . (1982). Proceedings of Seminar on the Role of Overburden Analysis in Surface Mining, Wheeling, W. Va., My 6-7, 1980. Washington, DC: US Dep. of the Interior, Bureau of Mines.

MLA

Simpson David G, Seminar on the Role of Overburden Analysis in Surface Mining, . Proceedings of Seminar on the Role of Overburden Analysis in Surface Mining, Wheeling, W. Va., My 6-7, 1980. Washington, DC: US Dep. of the Interior, Bureau of Mines. 1982.