TY - RPRT TI - Vibrophonocardiograph investigation and development study. AU - Barker, P. R. AU - Celentano, J. T. AU - Randall, R. L. AU - Walton, D. M. AU - Wright, L. N. PY - 1967 UR - https://ntrs.nasa.gov/citations/19670062932 ID - 19670062932 ER -