@article{ref1,
title="Recent Czechoslovakian work on figure legibility, color standards and road sign standardization",
journal="Human factors",
year="1965",
author="Bertone, C. M.",
volume="7",
number="3",
pages="267-271",
abstract="Abstract unavailable.",
language="",
issn="0018-7208",
doi="",
url="http://dx.doi.org/"
}