Dyfyniad APA

Johannsen,Albert. (1939). A descriptive petrography of the Igneous rocks,Vol.1Introduction,Textures,Classsifications and Glos. Allied.

Dyfyniad Arddull Chicago

Johannsen,Albert. A Descriptive Petrography of the Igneous Rocks,Vol.1Introduction,Textures,Classsifications and Glos. Bombay: Allied, 1939.

Dyfyniad MLA

Johannsen,Albert. A Descriptive Petrography of the Igneous Rocks,Vol.1Introduction,Textures,Classsifications and Glos. Allied, 1939.

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