@article{ref1,
title="Calls on physicians for medical aid and morbidity in Poland (July 1967--June 1968). VI. Evaluation of morbidity by disease and injury groups",
journal="Przeglad Epidemiologiczny",
year="1973",
author="Kostrzewski, J. and Branowitzer, Z.",
volume="27",
number="4",
pages="453-467",
abstract="<p>[Abstract unavailable]</p><p>Language: pl</p>",
language="pl",
issn="0033-2100",
doi="",
url="http://dx.doi.org/"
}