TY  - BOOK
AU  - Hulton D A Ed.
ED  - Conference on combinational mathematics (1972 : New Castle)
TI  - Proceeding on combinatorial mathematics
T2  - Lecture nolesin mathematics; 403
U1  - B217p8,N72, L43;3 
PY  - 1974///
CY  - Berlin
PB  - Springer-Verlag         
KW  - Combinatorial theory
ER  -