How children use arithmetic
Series: [U. S.] Office of Education. Bulletin, 1951, no. 7. Place of subjects series; Bulletin (United States. Office of Education) ;; 1951, no. 7.
Publisher: Federal Security Agency, Office of Education
Published: 1951
Place of publication: [Washington]
Language: eng
Number of pages: 13
Subjects: Arithmetic -- Study and teaching.