TY  - BOOK
AU  - Greenwood,Frank
AU  - Greenwood,Mary M.
AU  - Harding,Robert E.
TI  - Business telecommunications
SN  - 0697067742
U1  - 384 
PY  - 1988///
CY  - Iowa
PB  - Wm C.Broen
KW  - Telecommunication
ER  -