J. W. Studebaker, F. B. Knight & G. M. Ruch.
Teacher's guidebook for Study arithmetic, 6.
R602648. Teacher's guidebook for Study arithmetic, 6. By J. W. Studebaker, F. B. Knight & G. M. Ruch. NM: 17 p. © 26Mar48; AA80825. Scott, Foresman and Company (PWH); 3Apr75; R602648.
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