Principles of telephony
Biswas, N.N.
Principles of telephony / by N.N. Biswas - New York: Asia Publication House, 1970. - 136p.
818527309-X
Applied physics
Group sector
Manual telephony
Telephone instruments
621.385 / BIS/P
Principles of telephony / by N.N. Biswas - New York: Asia Publication House, 1970. - 136p.
818527309-X
Applied physics
Group sector
Manual telephony
Telephone instruments
621.385 / BIS/P