000 00279nam a2200109Ia 4500
008 200527s9999||||xx |||||||||||||| ||und||
082 _a511.6 VIL
100 _aVilenkin, N.
245 0 _aCombinational Mathematics for Recreation
264 _bMIR Publihsers
_c1972
300 _a207p.
999 _c15216
_d15216