000 00220 a2200097 4500
001 50893
100 _aHubble Edwin
245 _aThe realm of the nebulae
260 _aLondon
_bYale University
_c
090 _c32258
_d32258
942 _aNUST-CAE
_cM
_c24734
999 _c285966
_d285966