Gwyer, G. D. Perennial crops supply response : the case of Tanzanian sisal / G. D. Gwyer. - Ashford, Wye College : School of Rural Economics and Related STudies, 1971 - vii, 46 p. : illus. ; 22 cm. - Agrarian development studies, Report ; no. 3 . Bibliography: p. 46. Open access. ISBN: 0901859060 LCCN: 72189256 Subjects--Topical Terms: Sisal industry--Tanzania.Sisal hemp--Tanzania.