REFERENCES
- Becker (G), Fisher (?) & Kramer (G). Methods and Results of International VLF Time Comparison (In Germany) Proc. Colloque International de Chronometric, Paris, 1969.
- Mathur (BS), Banerjee (P), Sood (PC), Mithlesh Saxena, Kumar (N) & Suri (A K). Precise T & F Intercomparison between NPL, India and PTB, Federal Republic of Germany via Satellite Symphonie-1, XII Annual PTTI Applic. & Plan. Meeting, Dec. 2–4, 1980.
- Belrose (J S). Low and Very Low Frequency Radio Wave Propagation, AGARD Lecture series XXIX, 1968.
- Reder (F N). VLF Propagation Observed during Low and High Solar Activity. Progress in Radio Science: 1966–1969, Vol. 2, USRI-Belgium, 1971.
- Swanson (E R) & Kugel (C P). OMEGA VLF Timing, N ELC Tech. Rep. No. 1740 (Revision-1), June 1972.
- Iijima (S), Torao (M) & Fujiwara (K). Phase Variations of VLF Wave GBR and GBZ as Received. Annals of Tokyo Astron. Observatory, 11, 1; 1968.