F. B. Knight, J. W. Studebaker & G. M. Ruch.
Study arithmetic. Book 6.
R604572. Study arithmetic. Book 6. By F. B. Knight, J. W. Studebaker & G. M. Ruch. NM: revisions. © 7Apr48; A21792. Scott, Foresman and Company (PWH); 5May75; R604572.
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