@article{ref1,
title="From emergency to social-security in Sudan -n 1. The problem",
journal="Disasters",
year="1990",
author="Duffield, M.",
volume="14",
number="3",
pages="187-203",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0361-3666",
doi="",
url="http://dx.doi.org/"
}