00345nam a2200109Ia 4500008004100000082001900041100001700060245002400077260005400101300001300155440006700168251028b        |||||||| |||| 00| 0 eng d  a511.5bOr66.TG  aOre, Oystein  aTheory of graphsb/  aProvidence:bAmerican Mathematical Society,c1962  ax, 270p.  aAmerican Mathematical Society Colloquium Publications ;  v. 38