REFERENCES
- McArthur, E. D., “Disk seal tubes”, Electronics, 18 (February 1945), 98.
- R.C.A., U.S.A. Pencil Tubes.
- Gurewitsch, A. M. & Whinnery, J. R., Proc. IRE, 35 (May 1947), 462.
- Calla, O. P. N., J. Instn Telecom. Engrs, 13 (12) (1967), 478.
- Calla, O. P. N., J. Instn Telcom. Engrs, 14 (6) (1968), 233–35.
- Calla, O. P. N., “Pulsed Radar Transponder”, Students' Journal, 7 (2) (June 1966).