Correlation of the Middle and Upper Ordovician rocks of Baltoscandia using CONOP9: preliminary resultsGoldman, D.; Klosterman, S.L.; Nõlvak, Jaak; Sheets, H.D.; Miller, G.C.The Seventh Baltic Stratigraphical Conference : 17-18 May 2008, Tallinn, Estonia : abstracts & field guide2008 / p. 21