TY  - BOOK
AU  - Garey, Michael R. and Johnson, David S.
AU  - Johnson, David S. ; jt. auth.
TI  - Computers and intractability; a guide to the theory of NP-Completeness
T2  - Mathematical Sciences
U1  - 518.1 
PY  - 1979///
CY  - San Francisco
PB  - W. H. Freeman
ER  -