共 7 条
- [2] CABOT RC, PHYSL DIAGNOSIS, pCH10
- [3] CAMPBELL GA, 1922, BELL SYSTEM TECH NOV
- [5] The stethophone, an electrical stethoscope [J]. BELL SYSTEM TECHNICAL JOURNAL, 1924, 3 (04): : 531 - 549
- [6] WEGEL RL, 1923, J FRANKLIN I, V196
- [7] WEGEL RL, 1922, BELL SYSTEM TECH J, V1