00666nam a2200181Ia 4500082001600000100008600016245008600102260004800188300001600236440006000252500000500312653000600317700002200323952009800345964001700443921000900460999001500469  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.  00104070aISIbISId1998-09-07l0o511.6 B862pDP21448r2019-02-14 00:00:00w2019-02-14yBK  abcdefg  a9024  c9024d9024