@article{ref1,
title="Travel surveys: current options",
journal="Transportation research record",
year="1986",
author="Braswell Peterson, Emily and Hamburg, John R.",
volume="1097",
number="",
pages="1-3",
abstract="The underlying factors that form the basis for travel survey design and their relationship to the most common options currently available for collecting travel data are described. A comparison of the advantages and disadvantages of each of the options is also included.<p /><p>Language: en</p>",
language="en",
issn="0361-1981",
doi="",
url="http://dx.doi.org/"
}