00371nam a2200133 a 450000500170000002000140001708200150003110000230004624500660006926000320013530000220016749000240018970000240021320251203110159.0  a084933988  a511.6bKRE  aKresher, Donald L.  aCombinatorial algorithmsbGeneration, Enumeration, and search  aBoca RatonbCRC Pressc1999  a329p.c23 cm H.B.  aCRC Press series on  aStinson, Douglas R.