@book{95909,
	author = {Agencey for International Development},
	title = {Soil fertility requirments to attain efficient production of food crops on the extensive, deep, wel-drained but relatively infertile asid soils of the humid tropics; Annual summery prograss report 1968-1970},
	publisher = {AID},
	year = {1970},
	address = {Ithaca}
}