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024 _a48472
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040 _aCSL
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041 _aeng
082 _aH42, L62
100 _aOpen University
245 0 _aEarth Science topics and methods
260 _c1976
300 _ap.
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650 _a Epigene
650 _aGeology
942 _hH42, L62
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999 _c85583
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