It'll take some digging Chris. Here is one source I found googling.
http://www.africana.ru/biblio/afrocentrism/08_Mazov.htm
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? 1960 ?.
>...The author points out, that more than 500 African students studied
in the USSR in early sixties. They were faced some revealing of racism.
Soviet officials rejected the facts of racism or explained these facts
as the acts of foreign (“bourgeois”) secret services. Africans in the
USSR were equal to ‘whites’ and were divided according to class
distinctions. This approach to Africans in the USSR kept invariable up
to the USSR’s disintegration.
Michael Pugliese