TY  - BOOK
AU  - Donovan, John J.
TI  - Systems programming / 
SN  - 0074604821
U1  - 004 DON 22nd ed. 
PY  - 1972///
CY  - New Delhi
PB  - Tata McGraw-Hill
KW  - Systems programming
KW  - Assemblers
ER  -