Lyimo, J. G. The role and dynamics of traditional farming system in agricultural sustainability. the case of Matengo pits and Ufipa Mounds system - Dar es Salaam IRA 1997 - v,44p. 30cm. ISBN: 9976 69 047 9 Subjects--Topical Terms: Traditional farming LC Class. No.: IRA H62.5.I3E35 N.100