TY  - BOOK
AU  - Harary Frank Ed.
ED  - International conference on proof techniques in graph theory (1968 : Ann Arbor)
TI  - Proceeding on proof techniques in graph theory
U1  - B44p1,N68, K9 
PY  - 1969///
CY  - New York    
PB  -  Academic Press       
KW  -  Graph theory
KW  -  Nomography
KW  - Mathematics
ER  -