@article{ref1,
title="Drought and Change in A Tribal Economy - the Berti of Northern Darfur",
journal="Disasters",
year="1980",
author="Holy, L",
volume="4",
number="1",
pages="65-71",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0361-3666",
doi="",
url="http://dx.doi.org/"
}