00454nam a2200157Ia 4500003000900000008004100009040001600050080001500066100001700081245005500098260004800153300001400201650001400215650004100229650002600270IN-BaIIA211028s9999    xx            000 0 eng d  cIIA Library  a521.9bBAL  aBall, Robert 2aA treatise on spherical astronomycRobert  Ball     aCambridgebCambridge University Pressc1908  axii,506p.  aAstronomy  aAstronomy and Astrophysics Thesaurus  aSpherical Coordinates