@article{ref1,
title="Proceedings of the symposium on graduated diver licensing: documenting the science of GDL. Ghatham, Massachusetts, USA. November 5-7, 2002",
journal="Journal of safety research",
year="2003",
author="",
volume="34",
number="1",
pages="1-119",
abstract="Abstract unavailable.",
language="en",
issn="0022-4375",
doi="",
url="http://dx.doi.org/"
}