Craig, G. S. (1940). Science for the elementary school teacher. Boston: Ginn and Company.
استشهاد بنمط شيكاغوCraig, Gerald S. Science for the Elementary School Teacher. Boston: Ginn and Company, 1940.
MLA استشهادCraig, Gerald S. Science for the Elementary School Teacher. Boston: Ginn and Company, 1940.
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