@article{ref1,
title="Evaluative criteria for emergency ambulance systems",
journal="Social Science and Medicine (1967)",
year="1973",
author="Gibson, G.",
volume="7",
number="6",
pages="425-454",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0037-7856",
doi="",
url="http://dx.doi.org/"
}