Introduction to exchange systems /
Flowers, Thomas Harold.
Introduction to exchange systems / T. H. Flowers. - London : Wiley, 1976. - xvii, 326 p. : ill.
"A Wiley interscience publication"
047018651
Telephone stations.
Introduction to exchange systems / T. H. Flowers. - London : Wiley, 1976. - xvii, 326 p. : ill.
"A Wiley interscience publication"
047018651
Telephone stations.