<b>“Copyright certificates”.</b> Copyright certificates issued by the USSR state committee for invention and discovery register new methods and equipment used in treatment of various diseases.
Vyacheslav Bobkov / Вячеслав Бобков
CC BY-SA 3.0
<p>RIA Novosti archive, image #809103, <a rel="nofollow" class="external free" href="http://visualrian.ru/ru/site/gallery/#809103">http://visualrian.ru/ru/site/gallery/#809103</a>
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35 mm film / 35 мм негатив