Mining Symposium Duluth, Minn, University of Minnesota, Duluth Branch, American Institute of Mining and Metallurgical Engineers. Minnesota Section. Meeting, Pfleider, E. P., & Anderson, A. E. (1962). Twenty-third annual mining symposium and the annual meeting of the Minnesota Section, AIME, January 15-17, 1962, Duluth, Minnesota. University of Minnesota.
Παραπομπή σε μορφή Chicago (17η εκδ.)Mining Symposium Duluth, Minn, Duluth Branch University of Minnesota, American Institute of Mining and Metallurgical Engineers. Minnesota Section. Meeting, Eugene P. Pfleider, και Arthur E. Anderson. Twenty-third Annual Mining Symposium and the Annual Meeting of the Minnesota Section, AIME, January 15-17, 1962, Duluth, Minnesota. Minneapolis: University of Minnesota, 1962.
Παραπομπή σε μορφή MLA (8th εκδ.)Mining Symposium Duluth, Minn, et al. Twenty-third Annual Mining Symposium and the Annual Meeting of the Minnesota Section, AIME, January 15-17, 1962, Duluth, Minnesota. University of Minnesota, 1962.