Cochrane, W. W. (1969). The world food problem: A guardedly optimistic view. Thomas Y. Crowell.
Dyfyniad Arddull ChicagoCochrane, Willard Wesley. The World Food Problem: A Guardedly Optimistic View. New York: Thomas Y. Crowell, 1969.
Dyfyniad MLACochrane, Willard Wesley. The World Food Problem: A Guardedly Optimistic View. Thomas Y. Crowell, 1969.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.