000 00268nam a2200121Ia 4500
365 _b6
942 _cBK
654 _a
245 _aDiscovering the universe
260 _aLondon
_bEnglish Language Book Society
_c1964
082 _a523.016
300 _bPb
_c24.8cm
_a136
999 _c409674
_d409674
041 _aeng