RUCH, G. M.
Combined manual for Self-help arithmetic work-books. Grades 3-8. By G. M. Ruch, F. B. Knight & J. W. Studebaker.
RUCH, G. M. Combined manual for Self-help arithmetic work-books. Grades 3-8. By G. M. Ruch, F. B. Knight & J. W. Studebaker. © 20Dec40; AA353674. Scott. Foresman & Co. (PWH); 2Jan68; R426084.
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