TY  - BOOK
AU  - Dold A.
AU  - Eckmann, B. 
TI  - Lecture Notes in Mathematics 952:  : Combinatorial Mathematics IX 
SN  - 354011601X 
U1  - 511.6  
PY  - 1982///
CY  - New York: 
PB  - Springer Verlag; 
ER  -