RUCH, G. M.
Arithmetic for the emergency, by G. M. Ruch, F. B. Knight & J. W. Studebaker. Revision of Self-help mathematics work-book two.
RUCH, G. M. Arithmetic for the emergency, by G. M. Ruch, F. B. Knight & J. W. Studebaker. Revision of Self-help mathematics work-book two. © 12Nov42; AA414878. Scott, Foresman & Co. (PWH); 15Dec69; R474866.
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