TY  - BOOK
AU  - Garey, Michael R.
AU  - Johnson, David S.
TI  - Computers and intractability: A guide to the theory of NP-completeness
T2  - A Series of books in the mathematical sciences
SN  - 0716710455
U1  - 519.4 
PY  - 1979///
CY  - New York
PB  - W H Freeman and Company
ER  -