@article{ref1,
title="Standards in Statistics of Industrial Accidents and an Advance Step in the Classification of Industries",
journal="Quarterly publications of the American Statistical Association",
year="1917",
author="Kopf, EW",
volume="15",
number="",
pages="563-563",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="1522-5445",
doi="",
url="http://dx.doi.org/"
}