TY  - BOOK
AU  - Liu,C.L.
TI  - Introduction to combinatorial mathematics
AV  - QA164 .L58
U1  - 512/.5 
PY  - 1968///]
CY  - New York
PB  - McGraw-Hill
KW  - Combinatorial analysis
KW  - Local
N1  - 920306; Includes bibliographies
ER  -