RUCH, G.M.
Fourth-grade problems. Set 1-5. By G.M. Ruch, F.B. Knight & J.W. Studebaker.
RUCH, G.M. Fourth-grade problems. Set 1-5. By G.M. Ruch, F.B. Knight & J.W. Studebaker. © 15Dec38; AA285384. Scott, Foresman & Co. (PWH); 23Dec65; R377274.
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