TY  - BOOK
AU  - Polish Academy of Science, Institute of Mathematics
AU  - Skupien, Zdzislaw
AU  - Borewiecki, Mieczy-Slaw
TI  - Combinatorics and graph theory; proceedings of the 30th semester held at the Stefan Banach International Mathematical Cetre Warsaw, Sept. 15-Dec. 17, 1987
U1  - 511.6 
PY  - 1989///
CY  - Borewieki
PB  - Werszawa
ER  -