@article{ref1,
title="The evolution of black residential areas in late nineteenth-century cities",
journal="Journal of historical geography",
year="1975",
author="Groves, Paul A. and Muller, Edward K.",
volume="1",
number="2",
pages="169-191",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0305-7488",
doi="10.1016/0305-7488(75)90184-X",
url="http://dx.doi.org/10.1016/0305-7488(75)90184-X"
}