00334nam a2200133Ia 4500008004100000020001500041041001200056082001100068100001600079245004900095260003400144300000800178650001400186221030s9999    xx            000 0 und d  a8190698893  aEnglish  a105.23  aS. B. Singh 0aCombinotorics & Graph Theorycby S. B. Singh  bKhanna  Pub.aNew Delhic2007  a463  aComputers