Proceedings of the International Drainage Workshop. Wageningen, 1978 - Wageningen : International Institute for Land Reclamation and Improvement, 1979 - 731 p. ; gráfs. - Publication ; 25 . - Publication ; 25 . LCCN: 58269 Subjects--Topical Terms: Drenaje--Congresos. Dewey Class. No.: 631.6 / P7