1. Amos, S. W. u. F. C. Brooker: Microphones. Electronic Engng. 18 (1946) 109–111, 136–141, 190–192, 221–223, 255–258.
2. Anderson, L. J.: A pressure microphone for television and broadcast service. Broadcast News, 1952.
3. Anderson, L. F. u. L. M. Wigington: The KB—3A high-fidelity noise-cancelling microphone. Audio Engng. 34 (1950) 4, 17–17, 30–32.
4. Archbold, R. B.: An experimental probe microphone for the measurement of sound pressures. Electr. Engr. J. 45 (1953) 145–148;
5. Archbold, R. B.: An experimental probe microphone for the measurement of sound pressures.Physics Abstr. 56 (1953) 3959.