TY  - BOOK
AU  - Liu,C L.
TI  - Elements of discrete mathematics / 
T2  - MacgrawHill computer science series, 
SN  - 0071005447
U1  - 511 
PY  - 1985///
CY  - New York : 
PB  - McGraw-Hill , 
KW  - COMPUTER SCIENCE - MATHEMATICS
N1  - NULL
ER  -