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024 _a28593
037 _cTextual
040 _aCSL
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_cCSL
041 _aeng
082 _aB25, L21
100 _aSchubert Horst
245 0 _aCategories
260 _c1972
300 _ap.
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650 _aHigher algebra
942 _hB25, L21
_cTEXL
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999 _c94754
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