Não informado. (1950). IMM Abstracts. Institution of Mining and Metallurgy.
Chicago (17e ed.) BronvermeldingNão informado. IMM Abstracts. London: Institution of Mining and Metallurgy, 1950.
MLA (8e ed.) BronvermeldingNão informado. IMM Abstracts. Institution of Mining and Metallurgy, 1950.
Let op: Deze citaties zijn niet altijd 100% accuraat.