TY  - BOOK
AU  - Wiitala, Stephen A.
TI  - Discrete mathematics: a unified approach 
SN  - 0070701695
AV  - QA 39.2 .W55 1987 
PY  - 1987///
CY  - New York
PB  - McGraw-Hill Book Company
KW  - MATHEMATICS
N1  - Includes bibliographical references and index; 1. Mathematical logic and proofs -- 2. Sets and counting -- 3. Boolean algebras -- 4. Matrices -- 5. Graph theory -- 6. Directed graphs and trees
ER  -