@book{29219,
	author = {Bouček, Bedřich.},
	title = {The dendroid graptolites of the Silurian of Bohemia.},
	publisher = {Nakl. Ceskoslovenské akademíe vĕd,},
	year = {1957.},
	series = {Rozpravy V̂str̆edniho v́staru geologického, sv. 23},
	address = {V. Praze,},
	note = {Summary in Czech and Russian.}
}