@BOOK {SMITH:1995,
title = {Socioeconomic characterization of environments and technologies: IITA research guide, No. 50},
author = {Smith, J. },
series = {IITA research guide, No. 50},
year = {1995},
month = {February},
publisher = {International Institute of Tropical Agriculture (IITA)},
address = {Ibadan, Nigeria},
note = {37p.; IITA Technologies},
}