@article{ref1,
title="Chapter ii: classification of inland waterways. the way they should be studied",
journal="Annals of the American Academy of Political and Social Science",
year="1893",
author="",
volume="4",
number="5 suppl",
pages="14-19",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0002-7162",
doi="10.1177/000271629300400503",
url="http://dx.doi.org/10.1177/000271629300400503"
}