RUCH, G. M.
Self-help arithmetic workbook, 8, by G. M. Ruch, F. B. Knight & J. W. Studebaker.
RUCH, G. M. Self-help arithmetic workbook, 8, by G. M. Ruch, F. B. Knight & J. W. Studebaker. © 27Aug40; AA344794. Scott, Foresman & Co. (PWH); 2Jan68; R426072.
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