Domestication and commercialization of non-timber forest products in agroforestry systems :  proceedings of an international conference held in Nairobi, Kenya, 19-23 February 1996 / 
edited by R.R.B. Leakey ... [et al.]. 
 - Rome :  Food and Agriculture Organization of the United Nations,  1996. 
 - 297p.:  30cm 
 - Non-wood forest products,  9  1020-3370 ; .