UN Conference on Trade and Development. (2001). Handbook of World Mineral Trade Statistics. United Nations.
Чикаго маягийн жагсаалтUN Conference on Trade and Development. Handbook of World Mineral Trade Statistics. New York: United Nations, 2001.
MLA ишлэлUN Conference on Trade and Development. Handbook of World Mineral Trade Statistics. United Nations, 2001.
Warning: These citations may not always be 100% accurate.