@INBOOK {KANG:1989c,
title = {Alley cropping for food crop production in the humid and subhumid tropics},
author = {Kang, B. and Van der Kruijs, A. C. M. B. and Couper, D. C. },
year = {1989},
type = {Alley farming in the humid and subhumid tropics},
pages = {16--26},
publisher = {IDRC},
address = {Ottawa},
}