@article{ref1,
title="Operational Factors and Operational Yields",
journal="Operational research quarterly (1950)",
year="1950",
author="Parker, E. and Le Page, L. S.",
volume="1",
number="3",
pages="45-46",
abstract="Concerns the use of RADAR to improve maritime effeciency and safety.<p />",
language="",
issn="1473-284X",
doi="",
url="http://dx.doi.org/"
}