You have an expert knowledge in this topic, namely the knowledge of Russian language. Most of English Wikipedia editors don't.
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Most unilingual English editors are surprised by the vast quantity of low hanging fruit. Out of curiosity at one time I looked up the fairly common Spanish name "Reyes" in the original 70 volume "Enciclopedia universal ilustrada". I found 30 individuals there with that simple uncompounded surname. Only two of these appeared in the English Wikipedia, and only one of the two in the Spanish Wikipedia. Could something similar be said of the great Soviet Encyclopedia? I have before looked at a couple short encyclopedic works in Russian, one relating to hockey and one to movies. Both did address their subject as it related to the United States as well as their own country. Comparably
sized American publications would leave the reader wondering if there even was such a thing as a Russian film industry. The dismissive attitude that Russian works were written by Communists becomes quite thin in subjects that are inherently apolitical.
Indeed, 7 out of 19 articles I created over three weeks are in Great Soviet Encyclopaedia (and about a dozen of more among those I expanded as well). One of these (on a folklorist Anna Astakhova, which I started today) does not exist in Russian Wikipedia. Admittedly all of them (in GSE, not those I created) are very short and hardly useful for creation a Wikipedia article - although GSE gives a clear proof of notability, just in case.
Cheers Yaroslav