@article{ref1,
title="Heads and freaks: patterns and meanings of drug use among hippies",
journal="Journal of health and social behavior",
year="1968",
author="Davis, F. and Munoz, L.",
volume="9",
number="2",
pages="156-164",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0022-1465",
doi="",
url="http://dx.doi.org/"
}