KNIGHT, F. B.
Study arithmetics. Book 6. By F. B. Knight, J. W. Studebaker & G. M. Ruch. Illustrated by John Osebold & Matilda Breuer. New ed.
KNIGHT, F. B. Study arithmetics. Book 6. By F. B. Knight, J. W. Studebaker & G. M. Ruch. Illustrated by John Osebold & Matilda Breuer. New ed. © 20Aug43; AA436031. Scott, Foresman & Co. (PWH); 5Oct70; R491942.
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