@book{52685,
	author = {Workshop on Management of Low Fertility Acid Soils of the American Humid Tropics ( and Wienk, J. F.},
	title = {Proceedings},
	publisher = {Instituto Interamericano de Cooperación para la Agricultura,},
	year = {1982},
	series = {Ser. Ponen., resultados y recomendaciones de eventos técnicos},
	address = {San José, C.R. :}
}