@article{ref1,
title="Predicting attention-gaining characteristics of highway traffic signs: Measurement technique",
journal="Human factors",
year="1964",
author="Forbes, Theodore Watson",
volume="36",
number="",
pages="371-374",
abstract="Abstract unavailable.",
language="",
issn="0018-7208",
doi="",
url="http://dx.doi.org/"
}