@article{ref1,
title="Natural hazards: causes and effects. Lesson 1--introduction to natural disasters",
journal="Prehospital and disaster medicine",
year="1994",
author="Perez, E. and Thompson, P.",
volume="9",
number="1",
pages="80-87",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="1049-023X",
doi="",
url="http://dx.doi.org/"
}