Citation Hunt

The Wikipedia snippet below is not backed by a reliable source. Can you find one?

Click I got this! to go to Wikipedia and fix the snippet, or Next! to see another one. Good luck!

In page Novouralsk:

"

The Ural Electro Chemical Plant's main activities are uranium enrichment and the development of centrifuge technology, as well as the manufacture of instruments and industrial systems for the nuclear industry. The plant began operating in 1949 and was the site of the Soviet Union's first gaseous diffusion enrichment plant. In 1950, certain technical difficulties were resolved and UECP began producing tens of kilograms of 90 percent enriched uranium. The original plant, called D-1, was extended to include plant D-3 in 1951, and plants D-4 and D-5 in 1953. Officials from the Ministry of Atomic Industry once said that Sverdlovsk-44 was the only plant ever used to produce weapons-grade highly enriched uranium.