to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
https://creativecommons.org/licenses/by/4.0CC BY 4.0 Creative Commons Attribution 4.0 truetrue
Captions
Photocopy of the USSR copyright certificate (inventors Yuri Barabash, Valentin Balema, Vladimir Melnikov, Oleg Merginev, Boris Krasnokutsky, Mikhail Tulepov)
Фотокопия авторского свидетельства СССР (изобретатели Барабаш,Балема, Мельников, Мергинев, Краснокутский, Тулепов)