Keller, E. A. (2000). Environmental geology. Upper Saddle River, N.J: Prentice Hall.
Trích dẫn kiểu ChicagoKeller, Edward A. Environmental Geology. Upper Saddle River, N.J: Prentice Hall, 2000.
Deismireacht MLAKeller, Edward A. Environmental Geology. Upper Saddle River, N.J: Prentice Hall, 2000.
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