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This is an old revision of this page, as edited by LyraSurana (talk | contribs) at 06:50, 26 October 2020 (added citation). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

[1]

  1. ^ Aschengrau, Ann; Seage III, George R. (2020). Essentials of Epidemiology in Public Health 4th Edition. Burlington, MA: Jones and Bartlett Learning. pp. 110–116. ISBN 9781284128352.