KNIGHT, F. B.
Study arithmetic. Grade 4. Preprint of chap.1-2. By F. B. Knight, G. M. Ruch, J. W. Studebaker & W. C. Findley.
KNIGHT, F. B. Study arithmetic. Grade 4. Preprint of chap.1-2. By F. B. Knight, G. M. Ruch, J. W. Studebaker & W. C. Findley. © 17Apr35; AA172247. Scott, Foresman & Co. (PWH); 10Jan63; R308798.
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