Não informado. (1958). Information circular. Mines Branch, Department of Energy, Mines and Resources.
Cita Chicago Style (17a ed.)Não informado. Information Circular. Ottawa: Mines Branch, Department of Energy, Mines and Resources, 1958.
Cita MLA (8a ed.)Não informado. Information Circular. Mines Branch, Department of Energy, Mines and Resources, 1958.
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