References
- Kreezer , G. , Coakley , J. D. and Dallenbach , K. M. 1934 . The thyratron chronaximeter: Its operation and calibration. . Amer. J. Psychol. , 46 : 641 – 647 .
- De Silva , H. R. 1935 . A timer for vocal reactions with thyratron tubes and microphones. . Amer. J. Psychol. , 47 : 315 – 316 .
- De Silva , H. R. 1936 . An electronic voice reaction timer. . Amer. J. Psychol. , 48 : 143 – 144 .