Mann, C. H. (1928). How Schools use their time.
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Dyfyniad Arddull Chicago
Mann, Carleton Hunter. How Schools Use Their Time. New York, 1928.
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Dyfyniad MLA
Mann, Carleton Hunter. How Schools Use Their Time. 1928.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.