Philippines (Republic). Bureau of Mines. Minerals news service. v.1- OCt. 1949-. [s.n.
Cita Chicago (17th ed.)Philippines (Republic). Bureau of Mines. Minerals News Service. V.1- OCt. 1949-. Manila: [s.n.
Cita MLA (9th ed.)Philippines (Republic). Bureau of Mines. Minerals News Service. V.1- OCt. 1949-. [s.n.
Atenció: Aquestes cites poden no estar 100% correctes.