atkinson,
telephony:a detailed exposition of the telephone e: xchange systems of the british post office/ j; - 1 - uk: pitman 1948, - 509, xii. 25
no index
includes references
0 283 43180 3 (paper back):
385 atk 621
telephony:a detailed exposition of the telephone e: xchange systems of the british post office/ j; - 1 - uk: pitman 1948, - 509, xii. 25
no index
includes references
0 283 43180 3 (paper back):
385 atk 621