"atkinson, j . "
telephony:a detailed exposition of the telephone exchange sy: stems of the british post office/ j.. atkinson - 1 ed. - uk : pitman 1950. - "xii, 872p.; 24 cm."
0 273 43181 1
621. 385 atk
telephony:a detailed exposition of the telephone exchange sy: stems of the british post office/ j.. atkinson - 1 ed. - uk : pitman 1950. - "xii, 872p.; 24 cm."
0 273 43181 1
621. 385 atk