Kieinau, K. H.
Telephone installation - 1st ed. - Bombay Asia Publishing House 1965 - 208p. illus.
Telephone engineering
623.85 / HEI/1965
Telephone installation - 1st ed. - Bombay Asia Publishing House 1965 - 208p. illus.
Telephone engineering
623.85 / HEI/1965