000 00267nam a2200097Ia 4500
082 _aJ 523.8875 QUAS
245 0 _aQuasars and black holes
100 _a World Book, Inc Chicago, IL, [c.2010]
_99706
942 _cBK
008 210817s9999 xx 000 0 und d
999 _c229096
_d229093