Levine scale (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Levine scale" in English language version.

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books.google.com

Heart Sounds Made Incredibly Easy!, Volume 1. Lippincott Williams & Wilkins, Oct 1, 2004; page 106.

Freeman AR, Levine SA (1933). "Clinical significance of systolic murmurs: Study of 1000 consecutive "noncardiac" cases". Ann Intern Med. 6: 1371–1379. doi:10.7326/0003-4819-6-11-1371.
Keren Ron; Tereschuk Michele; Luan Xianqun (2005). "Evaluation of a Novel Method for Grading Heart Murmur Intensity". Arch Pediatr Adolesc Med. 159 (4): 329–334. doi:10.1001/archpedi.159.4.329.

Keren Ron; Tereschuk Michele; Luan Xianqun (2005). "Evaluation of a Novel Method for Grading Heart Murmur Intensity". Arch Pediatr Adolesc Med. 159 (4): 329–334. doi:10.1001/archpedi.159.4.329.