TY - BOOK ED - International Institute for Land Reclamation and Improvement.ILRI TI - Drainage principles and applications : : Vol. I: Introductory subjects-Vol.II: Theories of field drainage and watershed-Vol.III: Surveys and investigations-Vol.IV: Design and management of drainage systems PY - 1973////74 CY - Wageningen : PB - ILRI, KW - INGENIERIA HIDRAULICA KW - HIDROLOGIA AGRICOLA KW - DRENAJE KW - HIDROGEOLOGIA KW - SUELOS ER -