Conservation and development in Northern Thailand : proceedings of a programmatic workshop on agro-forestry and highland-lowland interactive system, held at Chiang Mai, Thailand, 13-17 November 1978 / Edited by Jack D. Ives, Sanga Sabhasri and Pisit Voraurai Ives, Jack D. edt. Sabhasri, Sanga jt. edt. Voraurai, Pisit jt. edt. 338.9 CON Includes bibliographical references. Tokyo : United Nations University, 1980. 1980. 1980 Text vi, 114 p. : eng