@article{ref1,
title="Stages in involvement with drugs",
journal="Pediatrician",
year="1987",
author="Voss, H. L. and Clayton, Richard R.",
volume="14",
number="1-2",
pages="25-31",
abstract="There are distinct stages in involvement with drugs, and data obtained in the 1985 National Household Survey on Drug Abuse are presented to show the extent to which people follow these stages. Cigarette smoking usually precedes consumption of alcoholic beverages, and use of these licit substances precedes use of marijuana and cocaine.<p /><p>Language: en</p>",
language="en",
issn="0300-1245",
doi="",
url="http://dx.doi.org/"
}