@article{ref1,
title="Helicopter Accident Analysis in Japan IHST Activities",
journal="Journal of the Japan Society for Aeronautical and Space Sciences",
year="2011",
author="Iboshi, Naohiro",
volume="59",
number="690",
pages="205-210",
abstract="English abstract unavailable.Language: ja<p />",
language="",
issn="0021-4663",
doi="",
url="http://dx.doi.org/"
}