

Center: Professor Valeria Troitskaya at the Institute of Geophysics, Soviet Academy of Sciences.
- Categories: Science & Technology
- Location: Moscow, Russia
- Event date: 01.01.1972
- Date published: 09.04.2018
- Author: Dmitriy Kozlov
- Credit: Sputnik
- Original: J72-879, 6x9 film
- Media: JPEG, 5292x3543px, 4.5Mb