@article{ref1,
title="Hazards of mass tourism and tourism research from the public health viewpoint",
journal="Internist",
year="1971",
author="Hittmair, A. M.",
volume="12",
number="7",
pages="266-268",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0020-9554",
doi="",
url="http://dx.doi.org/"
}