TY  - BOOK
AU  - Bollobas, Bela
TI  - Extremal graph theory
SN  - 9780486435961
U1  - 511.5 BOL-B 
PY  - 1978///
CY  - New York
PB  - Dover Publications
KW  - Extremal problems (Mathematics)
KW  - Graph theory
ER  -