Dyfyniad APA

Willaims, H. (1954). Petrography: An introduction to the study of rock in thin sections. VFS.

Dyfyniad Arddull Chicago

Willaims, Howel. Petrography: An Introduction to the Study of Rock in Thin Sections. Bombay: VFS, 1954.

Dyfyniad MLA

Willaims, Howel. Petrography: An Introduction to the Study of Rock in Thin Sections. VFS, 1954.

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