May 1st (April 18th) 1917 Instrumental M.P. Petrograd [Izomaterial: electronic resource]: [postcard]. - Electronic data (2 files: 1.9 MB). - (St. Petersburg: Presidential Library, 2017). - Access mode: the Internet portal of the Presidential Library. The title from the screen. Electronic reproduction of the postcard: May 1 (April 18th) 1917 Instrumental metro station PZ Petrograd [ Isomaterial]. [Petrograd, 1917]. 1 postcard: offset. Location: From a private collection. Copying by users is not allowed.
I. Presidential Library (St. Petersburg) .1. Postcards in the Presidential Library fund (collection). 2. The people (the collection). 3. Power (collection). 4. 1917: February-October (collection). 5. Territory of Russia: St. Petersburg, city (collection). 6. May Day - History - St. Petersburg, city - Postcards. 7. Workers - Petrograd, the city - 1917 - Postcards. 8. Documentary cards - Russia - 1909-1917.
BBC 63.3 (2) 535 -611 BBK 63.3 (2-2SPB) 535y611
Source of the electronic copy: Children's postcard museum Original storage: From private collection