Future telecommunications
HELDMAN
Future telecommunications Rober K. Heldman with contributions by T. F. Madison, T. A. Bystrzycki - Washington, D. C. McGraw-Hill 1993 - 234 p. ill. 24 cm
70280398
Future telecommunications Rober K. Heldman with contributions by T. F. Madison, T. A. Bystrzycki - Washington, D. C. McGraw-Hill 1993 - 234 p. ill. 24 cm
70280398