@INBOOK {LAGEMANN:1975a,
title = {Root crop/oil palm farming systems: a case study from Eastern Nigeria},
author = {Lagemann, J and Flinn, J. C. and Okigbo, B. and Moormann, F. R. },
year = {1975},
month = {October},
type = {IITA Papers of Staff in the Agricultural Economics Sub-Program 1973 - October 1975},
pages = {1--37},
publisher = {IITA},
}