@article {184,
	title = {Long term changes in the acidity of forest soils in north east Scotland},
	journal = {Soil Use and Management},
	volume = {4},
	year = {1988},
	pages = {102-107},
	author = {Billett, M.F. and FitzPatrickm, E.A. and Cresser, M.S.}
}
