TY  - BOOK
AU  - Heldman, Robert K
AU  - Madison, T. F / Bystrzycki, T. A
TI  - Future telecommunications: information applications, services, & infrastructure 
SN  - 0070280398
AV  - TK 5101 H474f 1993 
PY  - 1993///
CY  - Washington
PB  - McGraw-Hill
ER  -