A comparative study of forty-five-minute and sixty-minute class periods in high schools

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A comparative study of forty-five-minute and sixty-minute class periods in high schools

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Title: A comparative study of forty-five-minute and sixty-minute class periods in high schools
Author: Laas, Oswald John
Abstract: Not available
URI: http://hdl.handle.net/2346/8539
Date: 1930-05

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