@book {3816,
	title = {Paleobiologichni Izsledvaniya Vrkhu Madrepori ot Urgona v Sredniya Predbalkan [Paleobiological Aspects of Madreporian Corals from the Urgonian in the Middle Predbalkan]},
	year = {1968},
	month = {1968///},
	pages = {28 - 28},
	publisher = {Blgarska Akademiya na naukite Geologicheski Institut},
	organization = {Blgarska Akademiya na naukite Geologicheski Institut},
	address = {Sofia},
	author = {Zlatarski, Vassil N}
}
