@article {1898,
	title = {Effects of past sewage sludge additions on heavy metal availability in light textured soils: implications for crop yields and metal uptakes},
	journal = {Environmental Pollution},
	year = {2003},
	pages = {413-423},
	author = {Bhogal, A and Nicholson, F. A and Chambers, B. J and Shepherd, M. A}
}
