Kumar, G. W. W. a. R. Options for developing countries in mining development. Macmillan Press.
Čikaški stil citiranja (17. izdanje)Kumar, Grantley W. Walrond and Raj. Options for Developing Countries in Mining Development. Macmillan Press.
MLA način citiranja (8. izdanje)Kumar, Grantley W. Walrond and Raj. Options for Developing Countries in Mining Development. Macmillan Press.
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