Não informado. (1969). Minerals science and engineering. National Institute for Metallurgy.
Chicagoスタイル(17版)引用形式Não informado. Minerals Science and Engineering. Cottesloe, Africa do Sul: National Institute for Metallurgy, 1969.
MLA(8版)引用形式Não informado. Minerals Science and Engineering. National Institute for Metallurgy, 1969.
警告: この引用は必ずしも正確ではありません.