@INBOOK {SMITH:1993a,
title = {The role of technology in agricultural intensification: the evolution of maize production in the northern Guinea savannah of Nigeria},
author = {Smith, J. and Barau, A. D. and Goldman, A. and Mareck, J. H. },
editor = {Dvorak, K. A. },
year = {1993},
type = {Social science research for agricultural technology development: spatial and temporal dimensions},
pages = {144--166},
publisher = {CAB International},
address = {Wallingford, Oxon, UK},
}