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024 _a75739
037 _cTextual
040 _aCSL
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_cCSL
041 _aeng
082 _aA:R, K31;2
100 _aPopper Karl R
245 0 _aConjectures and refutations : The growth of scientific knowledge
260 _c1963
300 _ap.
_ccm.
650 _aScience
942 _hA:R, K31;2
_cTEXL
_2CC
999 _c38056
_d38056