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1بواسطة Keohane, Mary Pieters, 1904-
منشور في 1942Boston, New York [etc.] Ginn and Co. [1942]viii, 36, [1] p. illus. (incl. map) plates. 25 x 20 cm.“...North Central Association of Colleges and Secondary Schools. Committee on Experimental Units...”
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2بواسطة Kalp, Earl S.
منشور في 1941Boston, New York [etc.] Ginn and Company [c1941]vi, 65, [1] p. illus. (incl. maps) plates, diagrs. 25 x 20 cm.“...North Central Association of Colleges and Secondary Schools. Committee on Experimental Units...”
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3بواسطة Krug, Edward A.
منشور في 1939Boston, New York [etc.] Ginn and Co. [1939]vi, 74, [1] p. incl. front., tables, diagrs., form, plates. 25 cm.“...North Central Association of Colleges and Secondary Schools. Committee on Experimental Units...”
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4بواسطة Carrothers, Chester C.
منشور في 1939Boston, Ginn [c1939]vi, 91 p. illus., diagrs., form., plates. 25 cm.“...North Central Association of Colleges and Secondary Schools. Committee on Experimental Units...”
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5بواسطة Kalp, Earl S.
منشور في 1940Boston, New York, Ginn and Co. [c1940]2 p. l., 95, [1] p. illus., plates, diagrs. 25 x 20 cm.“...North Central Association of Colleges and Secondary Schools. Committee on Experimental Units...”
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6بواسطة Ward, Douglas S. (Douglas Sharp), 1910-
منشور في 1942Boston, New York [etc.] Ginn and Co. [c1942]viii, 101, [1] p. illus., plates, diagrs. 25 x 20 cm.“...North Central Association of Colleges and Secondary Schools. Committee on Experimental Units...”
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7بواسطة Kalp, Earl S.
منشور في 1942Boston, New York [etc.] Ginn and Co. [1942]vii, 71 p. illus. (incl. maps) plates, forms. 25 cm.“...North Central Association of Colleges and Secondary Schools. Committee on Experimental Units...”
