@article{ref1,
title="Geographic patterns and demographic correlates of paramedic runs in San Bernardino, 1977",
journal="Social science and medicine, medical geography",
year="1979",
author="Williams, P. M. and Shavlik, G.",
volume="13D",
number="4",
pages="273-279",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0160-8002",
doi="",
url="http://dx.doi.org/"
}