Viking Age and Medieval Finds of East Baltic Amber in Latvia and the Neighbouring Countries (9th-16th Century) - Mugurēvičs, Ēvalds (International Conference on Amber in Archaeologyn4d2001cTalsi [Tf1]. Amber in archaeology. - Riga : Institut of the History of Latvia Publ., 2003. - 257 S.. - Ill., Kt.. - ISBN 9984-601-77-3, 2003)