000 00279nam a22001217a 4500
999 _c929
_d929
020 _a0859507335
082 _a510
_bMUR
100 _aMurray. les
245 _aprogress in Mathematics
_cMurray. les
260 _bStanley Thornes (Publisherd) Ltd
_c1990
300 _a433p.
942 _cR