@article {1176,
	title = {Statutory Instrument (1989): The Sludge (Use in Agriculture) Regulations},
	year = {1989},
	institution = {HMSO},
	address = {London},
	author = {HMSO}
}
@article {1150,
	title = {Surface Waters (Dangerous Substances) (Classification) Regulations No 2286},
	year = {1989},
	institution = {UK Statutory Instruments},
	edition = {2286},
	author = {HMSO}
}
