00310nam a2200121Ia 4500008004100000020001800041041001200059100001600071245004900087260002800136300000800164650001600172221030s9999    xx            000 0 und d  a9788190645102  aEnglish  aS. B. Singh 0aCombinatorics & Graph Theorycby S. B. Singh  bKhanna  Book Pub.c2007  a461  aBB Computer