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Elements of soil conservation | Bok | 631.4 B43e Bennett, Hugh Hammond / - New York : McGraw-Hill, 1947. - X, 406 s. - Språk: Engelsk | Bennett, Hugh Hammond | 1947 |
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Soil conservation | Bok | 631.4 B43s Bennett, Hugh Hammond / - New York : McGraw-Hill, 1939. - XVII, 993 s. (McGraw-Hill Series in Geography) - Språk: Engelsk | Bennett, Hugh Hammond | 1939 |