Poleman, T. T. and Freebairn, D. K., eds. 1973. Food,
 Population and Employment. New York: Praeger.

Saint, W. S. and Coward, E. W. 1977. "Agriculture and
 Behavioral Science: Emerging Orientation." Science
 197:733-737.

Swift, J. 1978. "Notes on Traditional Knowledge, Modern
 Knowledge and Rural Development." Paper presented at
 IDS Workshop on the Use of Indigenous Technical Knowledge
 in Rural Development, 13-14 April 1978, Brighton, Sussex,
 England.

Technical Advisory Committee. 1978. Farming Systems Research
 at the International Agricultural Research Centers.
 Washington, D. C.: TAC Secretariat, CGIAR.

Van Schilfgaarde, J. 1977. "Discussion: Enhancing Natural
 Resource Use to Increase World Food Production." American
 Journal of Agricultural Economics. 59:851-852.

Vermeer, D. E. 1979. "The Tradition of Experimentation in
 Swidden Agriculture Among the Tiv of Nigeria." In
 Applied Geography Conference, SUNY, Binghamton. Edited
 by J. M. Frazier and B. L. Epstein. Vol. 21, pp. 244-257.

Zandstra, H. G. and Carangal, V. R. 1978. "Crop Intensification
 for the Asian Rice Farmer." IRRI Cropping Systems Program.
 (Unpublished draft.)