Metallographic investigation of iron blooms and bars from the smithy site of Käku, EstoniaSaage, Ragnar; Peets, Jüri; Kulu, Priit; Peetsalu, Priidu; Viljus, MartFennoscandia archaeologica2018 / p. 46−58 : ill https://www.tiedekirja.fi/default/fennoscandia-archaeologica-xxxiv.html