An item dealing with the shipping on the Danube reported the SDGP (Soviet Danube Shipping Agency) tug Novgorod towing sea lighters leaving Vienna, Austria towards the Soviet Union on 26 November 1952.
Source
The report was published on www.archive.org, document number CIA-RDP80-00810A000400710008-4
Source
The report was published on www.archive.org, document number CIA-RDP80-00810A000400710008-4