2018
Gusev - Math 100 Genious Ideas ru
    https://chitatel.by/catalog/book/1221595
    CEB8A16869878B83772E7E926F69DE91
    4DEE77F7894DA8DA375E5345A7C5BE13
2017
Gusev - Fascinating Science Math ru
    766792D4DE8E68317FDF48CF569AD479
    220D803DD65F85C7DAF9D2353758C367
    https://vk.com/doc392920084_473456607?hash=4a64c068405b1a4ecc
Worderman - How to Explain a Math to a Child 4th ed ru
    https://chitatel.by/catalog/book/354771
    688FAEBF61FB0D87DE8F3EC4E7991D8D    
    039C9EB843DAF73A774D4971EE5B2E1A
Jackson - Mathematics Illustrated History of Numbers ru
    5C9300ADCFDEBF2100D0CD2BCDD716FA
    37ECB1F7E9AA048CF47DB1600311A9EE
2015
Albov - From Abaq to Qubit ru
    F79D91587999B8CD566E69937729CBB2
    98DD17331723369084795D93BDF8941D
    C1EE4D84053B0DD5D9DC6294B555C533
2005
Spivak - New School Encyclopedia - Numbers and Figures ru
    http://www.kvant.info/panov/enciklop.pdf
1998
Aksenov - Avanta Math ru
    B52B77F60985CCD4570A1078EE0BCD7F
    4288667F883BDF6EC7DEEDCDAD589474
    ! not loaded, huge size
1989
Savin - Enciclopedic Dictionary of Young Mathematician 2nd ed ru
    74775AF2C3A903C54FF0E2E3D4A82D55
    01739FF2A35521AB467CDA62BB4831A5
    55A8C3E6B23C8143F176DD6F4AA584AD
    A110F32724B32DADD1B1200D1C72B43A
    old - 1985
    B143638C76912F591B83D476262EA54F
    2D09AE292495B4C25BC4127748102615