Image: Stamp of USSR 4309
![Stamp of USSR 4309](/images/thumb/7/71/Stamp_of_USSR_4309.jpg/426px-Stamp_of_USSR_4309.jpg)
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Original image (631 × 887 pixels, file size: 81 KB, MIME type: image/jpeg)
Description: Почтовая марка СССР 1974 г. № 4309. Советский математик И. Г. Петровский, на заднем плане — Московский государственный университет. Тираж — 3,75 млн экз.
Title: Stamp of USSR 4309
Credit: Собственная коллекция
Author: Министерство связи СССР. Рис. Е. Анискина.
Usage Terms: Public domain
License: Public domain
Attribution Required?: No
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