Book 3. By J. W. Studebaker, W. C.

Findley. F. B. Knight & G. M. Ruch.

© 29Nov44; AA470549. Scott, Foresman

& Co. (PWH); 6Dec71; R517879.

STUDY ARITHMETICS; teacher's guidebook.

U.S. Copyright Renewals, 1971 July - December · 第 5 / 6 章