TY  - BOOK
AU  - Wiitala,Stephen A.
TI  - Discrete mathematics: a unified approach 
SN  - 0070701695 :
U1  - 510 22
PY  - 1987///
CY  - New York
PB  - McGraw Hill
KW  - Mathematics
KW  - Computer science
KW  - 0Mathematics
N1  - Includes bibliographies references and index
ER  -