000			00366nam a2200145Ia 4500
008			211109s9999||||xx |||||||||||||| ||und||
082			_a520 _bBAL-T
100			_aBall,
245		0	_aTratise On Spherical Astronomy
260			_bCambridge University _aNew York _c1928
300			_a256p.
630			_xGeneral Stack
650			_aAstronomy _xAstronomy
942			_cBOOK
999			_c4318 _d4318