Helge G. Backlund 1878–1958 Publication Type: Journal Article Authors: H. Lundegårdh Source: Geologiska Föreningen i Stockholm Förhandlingar, Volume 80, Issue 4, p.488-491 (1958) URL:https://swab.zlibcdn.com/dtoken/37cb4456dee198cbe93e1af787123719/11035895809447256.pdf