00394nam a2200145Ia 4500020001800000082001700018100001600035245005800051250000800109260003600117300002900153500005600182500000500238700000500243  a9780763753818  a516bSt78.GM  aStahl, Saul  aA gateway to modern geometrybthe poincare half-plane  a2nd  aSudburybJones & Bartlettc2008  aviii, 255p. Bibl. Index.  a"Purchased under NBHM grant for the year 2008-2009"  a  a