This vintage medical educational program was developed by Abe Ravin, M.D., for the University of Colorado School of Medicine. Designed for physicians and medical students, it provides a comprehensive audio-print study of heart sounds and murmurs.

• Includes original outer mailing box from Merck Sharp & Dohme (MSD)
• Features a detailed instructional booklet with visual diagrams
• Contains the original cassette tape titled "Auscultatory Analysis and Differentiation of Cardiac Valvular Murmurs"
• Outer box shows significant shelf wear, scuffing, and vintage mailing labels dated 1976
• Internal booklet and cassette appear to be in good vintage condition
• Untested audio functionality

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