000			00321nam a2200133Ia 4500
005			20260205040149.0
008			260111s9999||||xx |||||||||||||| ||und||
082			_a517 W618C
100			_aWHITTAKER EDMUND
245		0	_aCALCULUS OF OBSERVATIONS
260			_aLOND. _bBLACKIE AND SONS _c1954
300			_a347
942			_cBK
999			_c1027 _d1027