TY  - BOOK
AU  - CCITT
TI  - BLUE BOOKS,VOLUME IV,FASCICLE IV.4:SPECIFICATIONS FOR MEASURING EQUIPMENT SERIES O RECOMMENDATIONS,I          Q
SN  - ERNET
U1  - 1135 
PY  - 1989///
CY  - GENEVA
PB  - ITU
N1  - SC-021
ER  -