BOUWER, H. Groundwater Hydrlogi Herman Bouwer. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)BOUWER, Herman. Groundwater Hydrlogi Herman Bouwer. McGraw-Hill.
Lua MLA (8ú heag.)BOUWER, Herman. Groundwater Hydrlogi Herman Bouwer. McGraw-Hill.
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