@book{121079,
	author = {HAY, G. and SMIT, F.},
	title = {ESTIMATING THE NUMBER OF DRUG INJECTORS FROM NEEDLE EXCHANGE DATA},
	url = {\\Srvdatos\siis\docus\Revistas electrónicas\Addiction Research and Theory R.1038\2003\Estimating the number of drug injectors.pdf}
}