@article{ref1,
title="Vehicle traffic on the german trunk roads. results of the traffic count of 1936/37",
journal="Zeitschrift des Vereines Deutscher Ingenieure",
year="1939",
author="Hoffmann, K.",
volume="83",
number="",
pages="1126-1127",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0341-7255",
doi="",
url="http://dx.doi.org/"
}