Семаков В. С. Параллельность. — 1975
Семаков В. С. Параллельность : [диафильм по геометрии для 6 класса] / [консультант Р. С. Черкасов]. — М. : студия «Диафильм», 1975. — [4], 37 кадров.
© «Математическое образование», 2006—2024
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