Semen Spiridonovich Spiridonov

• Filosofskie i sotsiologicheskie vozzreniia chuvashskogo prosvetitelia I. Ia. Iakovleva
• Filosofskie i sotsiologicheskie vozzreniia chuvashskogo prosvetitelia I.Ia. Iakoleva
• Mirovozzrenie chuvashskogo poeta-demokrata K.V. Ivanova