KNIGHT, F. B.
Self-help mathematics work-book, 2, by F. B. Knight, G. M. Ruch & J. W. Studebaker. Teacher's ed.
KNIGHT, F. B. Self-help mathematics work-book, 2, by F. B. Knight, G. M. Ruch & J. W. Studebaker. Teacher's ed. © 28Aug40; AA343893. Scott, Foresman & Co. (PWH); 2Jan68; R426096.
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