000 00286 a2200121 4500
080 _a51
_bS 271 S
245 1 _aSearch for pattern
_cby W.W. Sawyer
260 _aMiddlesex
_bPenguin Books
_c1970
650 _aMathematics
100 1 _aSawyer, W.W.
_d
300 _a345 p.
901 _a160767
999 _c65761
_d65761