Borisovich F. K., Popov B. N., Semenov I. I., Khitenkov G. G. Konyukh Reference book. In Russian (ask us if in doubt)/Borisovich F. K., Popov B. N., Semenov I. I., Khitenkov G. G. Spravochnik konyukha. Moscow: State Publishing House of Collective and State Farm Literature 1940. 256s. SKUalbd57ece91819797fa.