Geologische RundschauApril 1934, Volume 25, Issue 1, pp 73–74 | Cite asMineralogie, Geologie, LagerstättenlehreAuthorsAuthors and affiliationsWilhelm PetrascheckGeologischer Unterricht 27 Downloads This is a preview of subscription content, log in to check access.Copyright information© Verlag von Gebrüder Borntraeger 1934Authors and AffiliationsWilhelm Petrascheck11.Leoben