Flowers, Thomas Harold.
Introduction to exchange systems / T. H. Flowers. - New York : Wiley, c1976. - xvii, 326 p. : ill. ; 24 cm.
Includes index.
0471018651
76013447
Telephone stations.
TK6211 / .F54
621.385 / FLI
Introduction to exchange systems / T. H. Flowers. - New York : Wiley, c1976. - xvii, 326 p. : ill. ; 24 cm.
Includes index.
0471018651
76013447
Telephone stations.
TK6211 / .F54
621.385 / FLI