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082 _a500.c8895/C848S
084 _aDDC
100 _aJ L Crammer
245 0 _aScience News
260 _aLondon
260 _bPenguin Books
260 _c1949
300 _a1,159
490 _v11
650 _aScience News
942 _cBook
999 _c4740
_d4740