{"id":"000282653","type":"book","title":"Gornoe delo i metallurgija v drevnejšej Bolgarii. (Russ.) [Bergbau und Metallurgie in Bulgariens Frühzeit.]","publisher":"Izd. Bolg. Akad. Nauk","publisher-place":"Sofia","author":[{"family":"Černych","given":"Evgenij Nikolaevič"}],"issued":{"raw":"1978"}}