References
- Mathur, K. N. & Rangan, C. S., J. scient. Ind. Res. (Supplement), 12, Frequency and Time Standards at the National Physical Laboratory, New Delhi, 1958, 83–87.
- Rangan, C. S., J. Instn. Telecom. Engrs, 6, Standard Frequency and Time Transmission Centre, ATA, Delhi, 1960, 67–70.
- Operating Instructions Standard Frequency Equipment, Airmec Limited, High Wycombe, Bucks, U.K.