Template:Ruzhencev & Bogoslovskaya, 1969

• Ruzhencev V.E. & Bogoslovskaya M.F., 1969. Bashkirskii ili kaial'skii iarus ? [The Bahkirian or the Kayalian stage ?] (article in Russian). Doklady Akademii Nauk SSSR, 189 (6): 1332-1335, Moskva.  
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