000			00398nam a2200145Ia 4500
008			230130s9999||||xx |||||||||||||| ||und||
020			_a9780387765624
100			_aGeoff McNamara
245		0	_aClocks in the Sky
250			_a2008
260			_bSpringer New York _c2008
440			_aSpringer Praxis Books
650			_aPhysics and Astronomy
856			_uhttps://doi.org/10.1007/978-0-387-76562-4
999			_c17850 _d17850