F. B. Knight, J. W. Studebaker & Gladys Tate.
Self-help arithmetic workbook 7.
R658459. Self-help arithmetic workbook 7. By F. B. Knight, J. W. Studebaker & Gladys Tate. NM: new design for covers, revisions & additions. © 22Mar50; AA147744. Scott, Foresman and Company (PWH); 28Mar77; R658459.
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