@article {53,
	title = {Effects of airborne fluoride emissions in Wales, Part 1},
	journal = {Environmental Pollution},
	volume = {47},
	year = {1987},
	pages = {63-78},
	author = {Perkins, D.F. and Millar R.O.}
}
@article {54,
	title = {Effects of airborne fluoride emissions in Wales, Part 2},
	journal = {Environmental Pollution},
	volume = {48},
	year = {1987},
	pages = {185-196.},
	author = {Perkins, D.F. and Millar, R.O.}
}
