Plummer, C. C., & McGeary, D. (1982). Physical geology (2nd ed.). Wm. C. Brown.
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Chicago-čujuhus (17. p.)
Plummer, Charles C., juo David McGeary. Physical Geology. 2nd ed. Dubuque: Wm. C. Brown, 1982.
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MLA-čujuhus (9. p.)
Plummer, Charles C., juo David McGeary. Physical Geology. 2nd ed. Wm. C. Brown, 1982.
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