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  1. 40703881090
    Author(s):Frost, J.
    Bing, J.
    Title:[Case of precordial murmur heard at a distance and caused by extrasystole]
    Subject(s):Heart sound Murmur, audible
    Journal Title Abbreviation:Nord. med.
    Date of Publication:1940
    Pagination:7: 1563.
    Type of Resource:Analytic
    Series/Volume/Page:Series 4/Volume 7/Page 388