TY  - BOOK
AU  - Vilenkin,Naum Iakovlevich
AU  - Shenitzer,A.
AU  - Shenitzer,S
TI  - Combinatorics
SN  - 0127219404
PY  - 1971///
CY  - New York
PB  - Academic Press
KW  - Combinatorial analysis
N1  - With answers
ER  -