G. E. Perry

Recent developments with the Soviet Union's VHF satellite navigation system

P. Daly, G. E. Perry, P. Daly, 1986 .

The Soviet space programme ߝ a Kettering view

G. E. Perry, 1982 .

Identificationn of a navigation satellite system within the Cosmos programme.

G. E. Perry, C. D. Wood, 1976 .