@UNPUBLISHED {OKALI:1979,
title = {An evaluation of the farmer's knowledge and use of hydromorphic toposequences in the western state of Nigeria: findings from seletected areas in the Oshun river basin},
author = {Okali, C. and Oben, T. and Ojo, A. and Lawson, T. L. },
year = {1979},
note = {Discussion paper, No. 4/79},
}