TY  - BOOK
AU  - Elmasri,Ramez
AU  - Carrick,A.Gil
AU  - Levine,David
TI  - Operating systems: a spiral approach 
SN  - 9780072449815
PY  - 2009///
CY  - New York, NY
PB  - McGraw-Hill Science
KW  - Operating systems (Computers)
KW  - Textbooks
N1  - Includes bibliographical references and index
ER  -