RUCH, G. M.
Self-help arithmetic work-book, 6, by G. M. Ruch, F. B. Knight & J. W. Studebaker. Teacher's ed. NM: new matter.
RUCH, G. M. Self-help arithmetic work-book, 6, by G. M. Ruch, F. B. Knight & J. W. Studebaker. Teacher's ed. NM: new matter. © 16Sep40; AA345563. Scott, Foresman & Co. (PWH); 2Jan68; R426085.
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