00286nam a2200109Ia 450000500170000000800410001708200170005810000190007524500300009426000440012430000080016820260205052613.0260111s9999||||xx |||||||||||||| ||und||  a520.3  R439D  aRidpath,Ian,Ed 2aA Dictionary of Astronomy  aNew YorkbOxford University Pressc1997  a536