@article{ref1,
title="Factors associated with age-specific death rates, California counties, 1964",
journal="American journal of public health",
year="1968",
author="Smith, Walter E.",
volume="58",
number="10",
pages="1937-1949",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0090-0036",
doi="",
url="http://dx.doi.org/"
}