Não informado. (1960). List of Bureau of Mines publications and articles with subject and author index. U.S. Department of the Interior, Bureau of Mines.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. List of Bureau of Mines Publications and Articles with Subject and Author Index. Washington: U.S. Department of the Interior, Bureau of Mines, 1960.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. List of Bureau of Mines Publications and Articles with Subject and Author Index. U.S. Department of the Interior, Bureau of Mines, 1960.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.