Montgomery, C. W. (1986). Environmental geology (2nd ed.). W.C. Brown.
Lua i Stíl Chicago (17ú heag.)Montgomery, Carla W. Environmental Geology. 2nd ed. Dubuque, Iowa: W.C. Brown, 1986.
Lua MLA (9ú heag.)Montgomery, Carla W. Environmental Geology. 2nd ed. W.C. Brown, 1986.
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