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MONTGOMERY, Carla W.. (2011). Environmental Geology (Ed. 9). Surakarta: McGraw-Hill.

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MONTGOMERY, Carla W.. Environmental Geology. Ed. 9 Surakarta: McGraw-Hill, 2011. Text.

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MONTGOMERY, Carla W.. Environmental Geology. Ed. 9 Surakarta: McGraw-Hill, 2011. Text.

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MONTGOMERY, Carla W.. Environmental Geology. Ed. 9 Surakarta: McGraw-Hill, 2011. Print.