@article{ref1,
title="Substance use problems reported by college students: combined marijuana and alcohol use versus alcohol-only use",
journal="Substance use and misuse",
year="2001",
author="Shillington, Audrey M. and Clapp, J. D.",
volume="36",
number="5",
pages="663-672",
abstract="This study examines the relationships among selected demographic characteristics, alcohol use only, alcohol plus marijuana use and substance-use related problems. Data are from 409 randomly selected undergraduate college students attending a large urban university. Poly-substance users were more likely than alcohol only users to be younger and experience all substance-use related problems studied. The relationship between poly-substance use and increased substance use-associated problems was also identified when controlling for other common predictors of substance use problems.<p /><p>Language: en</p>",
language="en",
issn="1082-6084",
doi="",
url="http://dx.doi.org/"
}