00297    a2200109   4500020001500000082001500015100002600030245003900056260005400095300002000149650001800169  a0521318572  a511.6bBAT  aBatten, Lynn Margaret  aCombinatorics of finite geometries  aCambridgebCambridge University Pressc1986g1986  ax, 173p.c24cm.  aCombinatorics