@book{6706,
	author = {Smith, F. W. and Van Den Berg, P. J.},
	title = {Foliar symptoms of nutrient disorders in the tropical shrub legume Gliricidia sepium},
	publisher = {Commonwealth Scientific and Industrial Research Organization,},
	year = {1992},
	series = {Div. of Trop. Crops and Past. Tech. Paper},
	address = {Melbourne :}
}