@article{ref1,
title="Swimming instruction for pre-school children",
journal="Journal of sports medicine",
year="1975",
author="Diamond, Eugene F.",
volume="3",
number="2",
pages="58-60",
abstract="unavailable.  Keywords: Drowning; Drowning Prevention; Water Safety",
language="en",
issn="0090-4201",
doi="",
url="http://dx.doi.org/"
}