00331nam a2200133 a 450000500170000002000150001708200150003210000190004724500280006625000120009426000480010630000260015470000170018020251203110737.0  a0521006015  a511.6bLIN  aLint, J.H. Van  aCourse in combinatorics  a2nd ed.  aCambridgebCambridge University Pressc1992  axiv, 602p.c24 cm. PB  aWilson, R.M.