TY  - BOOK
AU  - Ritchie, C.
TI  - Operating systems: Incorporating UNIX and MS-DOS
SN  - 8170296420
U1  - 004.451 R54O 
PY  - 1995///
CY  - New Delhi.
PB  - BPB Publications
KW  - Unix and Ms-Dos computer programming language
ER  -