Tohutoro APA (7th ed.)
Kayser, E. (1921). Lehrbuch der Geologie. Enke.
Tohutoru Kātū Chicago (17th ed.)
Kayser, Emanuel. Lehrbuch Der Geologie. Stuttgart: Enke, 1921.
Tohutoro MLA (9th ed.)
Kayser, Emanuel. Lehrbuch Der Geologie. Enke, 1921.
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