Proceedings of the symposium on fertilizer sulphur requirements and sources in developing countries of Asia and the Pacific : Bangkok, 26-30 January 1987 Fertilizer Advisory, Development and Information Network for Asia and the Pacific ( FADINAP) Fertilizers . Fertilizers Asia . 338.162 FEP Includes bibliographical references . [s.l.] : [s.n.], 1987. 1987. 1987 Text vi, 181 p. : eng Asia .