Principles of the constructions of operation and maintenance centers for existing telephone networks : Finnish-Soviet Telecommunications Scientific-Technical Symposium, Helsinki 6...10.2.1984 = Principy postroenija CTE na suščestvujuščih telefonnyh setjah : Simpozium po naučno-tehničeskomu sotrudničestvu v oblasti élektrosvjazi meždu Finljandiej i SSSR Helsinki 6-10.2.1984
Principles of the constructions of operation and maintenance centers for existing telephone networks : Finnish-Soviet Telecommunications Scientific-Technical Symposium, Helsinki 6...10.2.1984 = Principy postroenija CTE na suščestvujuščih telefonnyh setjah : Simpozium po naučno-tehničeskomu sotrudničestvu v oblasti élektrosvjazi meždu Finljandiej i SSSR Helsinki 6-10.2.1984
Principles of the constructions of operation and maintenance centers for existing telephone networks : Finnish-Soviet Telecommunications Scientific-Technical Symposium, Helsinki 6...10.2.1984 = Principy postroenija CTE na suščestvujuščih telefonnyh setjah : Simpozium po naučno-tehničeskomu sotrudničestvu v oblasti élektrosvjazi meždu Finljandiej i SSSR Helsinki 6-10.2.1984
Principles of the constructions of operation and maintenance centers for existing telephone networks : Finnish-Soviet Telecommunications Scientific-Technical Symposium, Helsinki 6...10.2.1984 = Principy postroenija CTE na suščestvujuščih telefonnyh setjah : Simpozium po naučno-tehničeskomu sotrudničestvu v oblasti élektrosvjazi meždu Finljandiej i SSSR Helsinki 6-10.2.1984