@article{ref1,
title="The teaching of preventive and social medicine",
journal="Burma medical journal",
year="1956",
author="San martin, H.",
volume="4",
number="1",
pages="2-5",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0007-6295",
doi="",
url="http://dx.doi.org/"
}