@article{ref1,
title="Criteria for an index of comparative trade union freedom",
journal="Conflict",
year="1978",
author="",
volume="1",
number="4",
pages="231-255",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0149-5941",
doi="",
url="http://dx.doi.org/"
}