KNIGHT, F. B.
Graded arithmetic drills; fourth-grade drill 1-20, by F. B. Knight, G. M. Ruch & J. W. Studebaker.
KNIGHT, F. B. Graded arithmetic drills; fourth-grade drill 1-20, by F. B. Knight, G. M. Ruch & J. W. Studebaker. © 17Apr42; AA400439. Scott, Foresman & Co. (PWH); 12Jun69; R462856.
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