@article{ref1,
title="Comparison of Railroad, Traffic, and Marine Signal Color Specifications",
journal="Journal of the Optical Society of America",
year="1946",
author="Gibson, KS and Haupt, GW and Keegan, HJ",
volume="36",
number="6",
pages="366-366",
abstract="[Abstract unavailable]  <p>Language: en</p>",
language="en",
issn="0030-3941",
doi="",
url="http://dx.doi.org/"
}