{"id":"001023260","type":"book","title":"Ėtapy vzaimodejstvija Volžskich bolgar s dinnami Povolž'ja","publisher-place":"Joškar-Ola","pages":"42-50","container-title":"Srednevekovye drevnosti Volgo-Kam'ja","author":[{"family":"Kazakov","given":"Evgenij Petrovič"}],"issued":{"raw":"1992"}}