00287nam a2200121Ia 4500008004100000041000800041082001500049100001800064245003100082260003400113300001000147650000800157060110s9999    xx            000 0 und d  aeng  a511bHAR/G  aHARARY, Frank  aGraph theorycFrank Harary  bNarosa Publishing Housec1969  a274p.  a511