TY  - BOOK
AU  - Mitchell,Bridger M.
ED  - Research and Development Corporation, 
TI  - Economic issues in usage-sensitive pricing
T2  - The Rand paper series
PY  - 1980///
CY  - Santa Monica, California
PB  - Rand Corporation
KW  - Telephone
KW  - Rates.
KW  -  Telephone
KW  - Economic aspects
N1  - Includes bibliographical references: page 21
ER  -