10654727106547270000c192-6be3d2a1111211065472701285cam a2200337Ia 450010654727080117s1949 sw af b 000 0 eng dTXRTXROCLOCLCQGnmDALAHessland, Ivar,1914-2006Investigations of the Lower Ordovician of the Siljan District, Sweden /by Ivar Hessland.Uppsala :Almqvist & Wiksells Boktr.,1949-v. :ill., plates ;25 cm.GnmUgg