History


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Preparatory courses of the analytical way of thinking in geometrical problems. Propedevtika analiticheskogo apparata v geometricheskikh zadachakh V-VI klassov. Propaedeutik des analytischen Apparates in geometrischen Aufgaben der Klassen 5-6. (Russian)
Mat. Shk. (1990) (no.2) p. 14-17. CODEN: MTSHA4 [ISSN 0025-5181]
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