KNIGHT, F. B.
Algebra problem scale. No. 1-20. By F. B. Knight and G. M. Ruch.
KNIGHT, F. B. Algebra problem scale. No. 1-20. By F. B. Knight and G. M. Ruch. © 1May31; AA67640. Scott, Foresman & Co. (PWH); 19Jan59; R229782.
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