TY  - BOOK
ED  - American Telephone and Telegraph Company
TI  - Unix system v: User's guide 
SN  - 0139405453
AV  - QA76.76O63 U56 1987
PY  - 1987///
CY  - Englewood cliffs, new jersey
PB  - Prentice Hall
KW  - UNIX System V (Sistema operativo)
ER  -