REFERENCES
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- Ramachandra Rao (B), Srirama Rao (M), Raja Ratnam (S) and Krishna Rao (D A V) and BHAGIRATHA RAO (E). Study of Meteors during December 1974 by Forward Scatter of VHF Radio Signals between Dehradun and Waltair. Indian J. Radio Space Phys. 4, 1975; 99–101.
- Terman (F E) and Pettit (J A). Electronic Measurements. 1952. McGraw-Hill Book Company Inc. New York. P 498.
- American Radio Relay League (ARRL) Headquarters Staff. The Radio Amateur's Hand Book. 1966. Newington Conn. USA P 49.
- American Radio Relay League (ARRL) Headquarters Staff. The Radio Amateur's Antenna Hand Book. 1954. Newington Conn. USA. P 113, 114, 163 and 164.