Boyer, Ernest L.
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£ 3.37
Boyer, Ernest L.
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£ 4.91
Boyer, Ernest L.; The Carnegie Foundation For The Advancement Of Teaching
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£ 6.61
Boyer, Ernest L.; Moser, Drew; Ream, Todd C.; Braxton, John M.
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£ 7.22
Boyer, Ernest L.
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£ 3.42
Boyer, Ernest L.; Hechinger, Fred M.
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£ 29.82
Boyer, E.L.
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£ 4.27