Sbornik arifmeticheskich zadach i uprazhnenij dlya nachal′noj shkoly. CHast′ 2 (1940) — Popova Natal′ya Sergeevna — 2020 — ISBN 978-5-907289-33-8 | Exlibrus

Sbornik arifmeticheskich zadach i uprazhnenij dlya nachal′noj shkoly. CHast′ 2 (1940) — Popova Natal′ya Sergeevna — 2020 — ISBN 978-5-907289-33-8 | Exlibrus