@book{3153,
	author = {Breimer, R. F. and Van Kekem, A. J. and Unesco.},
	title = {Guidelines for soil survey and land evaluation in ecological research /},
	publisher = {Unesco ;},
	year = {c1986.},
	address = {Paris :},
	note = {Prepared in co-operation with the International Soil Reference and Information Centre.}
}