@inbook{1141960520,
author={Robert B. Wallace},
title={Preface},
booktitle={Maxcy-Rosenau-Last Public Health and Preventive Medicine, 15e},
publisher={McGraw-Hill Medical},
address={New York, NY},
year={2017},
url={accessbiomedicalscience.mhmedical.com/content.aspx?aid=1141960520}
}