@book{222043,
	author = {Reijntjes, Coen and Haverkort, Bertus},
	title = {Farming for the future : an introduction to low-external-input and sustainable agriculture = La agricultura para el futuro: una introducción a bajos insumos externos y la agricultura sostenible. 
/ Coen Reijntjes, Bertus Haverkort, Ann Waters-Bayer},
	publisher = {Macmillan},
	year = {1992},
	address = {Leusden}
}