Trebuetsi͡a︡ dokazatʹ
By: Stanislav Sergeev.
Series: Novoe v zhizni, nauke, tekhnike : Serii͡a︡ Molodezhnai͡a︡ ; No. 12, 1976 g.; Novoe v zhizni, nauke, tekhnike.; 1976, 12.
Publisher: Znanie
Published: 1976
Place of publication: Moskva
Language: rus
Number of pages: 62
Subjects: Child development.; Moral education.