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_a526.3 _bM358n |
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_aMarr, James C. _988966 |
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_aNivelaciĆ³n de Tierras para Riego Superficial / _cJames C. Marr |
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_aLima : _bUniversidad Nacional Agraria la Molina , _c1974 |
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_a73 p. _b: il. |
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440 |
_aPublicaciĆ³n No.6 _988967 |
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_aNIVELACION DE SUPERIFICIE _988968 |
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