History


Help on query formulation
Analysis of children’s computational errors. A qualitative approach. Untersuchung ueber Rechenfehler bei Kindern. Eine qualitative Methode. (English)
Br. J. Educ. Psychol. (1977) v. 47 p. 149-154. CODEN: BJESAE [ISSN 0007-0998]
Valid XHTML 1.0 Transitional Valid CSS!