00479nam a2200133Ia 4500082001600000100008600016245008600102260004800188300001600236440006000252500000500312653000600317700002200323  a511.6bB862  aBritish Combinatorial Conference on Surveys in Combinatorics, Norwich, April 1989  aSurveys in combinatorics; proceedings of the 12th conferencebcEd. by J. Siemons  aCambridgebCambridge University Pressc1989  aviii, 217p.  aLondon Mathematical society lecture note seriesvv. 141  a  a   aSiemons, J. ; ed.