Fredén, C. (1988). Marine life and deglaciation chronology of the Vänern Basin, southwestern Sweden. Sveriges geologiska undersökning.
Dyfyniad Arddull ChicagoFredén, Curt. Marine Life and Deglaciation Chronology of the Vänern Basin, Southwestern Sweden. Uppsala: Sveriges geologiska undersökning, 1988.
Dyfyniad MLAFredén, Curt. Marine Life and Deglaciation Chronology of the Vänern Basin, Southwestern Sweden. Sveriges geologiska undersökning, 1988.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.