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Using Videotapes to Study the Construction of Mathematical Knowledge by Individual Children Working in Groups. Zur Bildung mathematischen Wissens bei Kindern in Gruppenarbeit - eine Untersuchung mittels Videokamera. (English)
J. Sci. Educ. Technol. (Sep 1992) v. 1(3) p. 177-89. [ISSN 1059-0145]
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