00284nam a2200109 a 450000500170000002000150001708200150003210000150004724500540006226000300011630000280014620251203110158.0  a156881111X  a511.5bCHU  aChung, Fan  aErodos on graphsbHis legacy of unsolved problems  aNatickbA.K. Petersc1999  axiii, 142p.c23 cm P.B.