TY  - BOOK
AU  - Mitchell Bridger M
AU  -  Vogelsang Ingo
TI  - Telecommunication pricing :  Theory and practice   
T2  - Rand Research Study
U1  - X3.76.73.N9, N1 
PY  - 1991///
CY  - Cambridge
PB  - Cambridge University Press        
KW  - Communication
ER  -