Principles of telephony /
Biswas, Nripendra Nath, 1928-
Principles of telephony / N. N. Biswas. - New York ; New Delhi : Asia Pub. House, c1970[Reprinted 1974]. - Various pagings : ill. ; 24 cm.
Includes index.
021022312X
77025524
Telephone, Automatic.
621.385
Principles of telephony / N. N. Biswas. - New York ; New Delhi : Asia Pub. House, c1970[Reprinted 1974]. - Various pagings : ill. ; 24 cm.
Includes index.
021022312X
77025524
Telephone, Automatic.
621.385