TY  - BOOK
AU  - Littlechild,S C
TI  - Elements of telecommunications economics
T2  - Institution of electrical engineers telecommunications series
SN  - 0906048176
U1  - 621.39:330 
PY  - 1979///
CY  - London
PB  - Institution of electrical engineers
KW  - telecommunication system
KW  - economics
ER  -