Waters-Bayer, Ann Participatory technology development in ecologically-oriented agriculture : some approaches and tools / Ann Waters-Bayer - London : ODI , 1989 - ii, 63p. : ill. ; 15 cm. - AAU. Research and Extension Network Paper No. 7 . Includes bibliographical references and index. ISBN: 09511873 Subjects--Topical Terms: Agricultureagricultural projectstechnology Gov. Doc. Class. No.: GB ODI AAU NP-7