00429nam a22001337a 450000500170000000800410001702000080005804100080006608200190007410000170009324501310011026000380024130000160027920260707124837.0260707b        |||||||| |||| 00| 0 eng d  a000  aeng  a517.521bTUT/R  aTutte, W. T.  aRecent Progress in Combinatoricsb: Proceedings of the Third Waterloo Conference on Combinatorics, May 1968c/ by W. T.  Tutte  aNew York:bAcademic Press,c1969.  axiv, 341p.;