TY  - BOOK
AU  - Beek Leland L
TI  - System Software An Introduction to System Programming 
SN  - 0201423006
SN  - 978-02014
U1  - 005.1BEE 
PY  - 2013///
CY  - New Delhi
PB  - Pearson Education
KW  - System software
KW  - Programming
ER  -