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British Heart Journal|March 1, 1978
Clinical assessment of calibrated jugular pulse recordingH J Pyhel, J Stewart, M E TavelChest|December 1, 1977
Ball variance in a Harken mitral prosthesis. Echocardiographic and phonocardiographic featuresL S Wann, H J Pyhel, W E Judson, et al.Pageof 1