Willaims, H. (1954). Petrography: An introduction to the study of rock in thin sections. VFS.
Chicago-stil citatWillaims, Howel. Petrography: An Introduction to the Study of Rock in Thin Sections. Bombay: VFS, 1954.
MLA-referensWillaims, Howel. Petrography: An Introduction to the Study of Rock in Thin Sections. VFS, 1954.
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