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Arithmetical achievements of pupils at the school for learning disabilities according to the syllabus for mathematics from 1978. Rechenleistungen von Schuelern der Schule fuer Lernbehinderte nach dem Rahmenlehrplan Mathematik von 1978. (German)
Z. Heilpaedagog. (1988) v. 39(2) p. 97-103.
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