Gillis, M. (1978). Taxation and mining: Nonfuel minerals in Bolivia and other countries. Ballinger Pub. Co.
Chicago-referens (17:e uppl.)Gillis, Malcolm. Taxation and Mining: Nonfuel Minerals in Bolivia and Other Countries. Cambridge, Mass: Ballinger Pub. Co, 1978.
MLA-referens (9:e uppl.)Gillis, Malcolm. Taxation and Mining: Nonfuel Minerals in Bolivia and Other Countries. Ballinger Pub. Co, 1978.
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