J. W. Studebaker, W. C. Findley. F. B. Knight & G. M. Ruch.
Teacher's guidebook for Study arithmetic, 4.
R602650. Teacher's guidebook for Study arithmetic, 4. By J. W. Studebaker, W. C. Findley. F. B. Knight & G. M. Ruch. NM: additions. © 25Mar48; AA80823. Scott, Foresman and Company (PWH); 3Apr75; R602650.
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