Reports
Southwest Africa (predominantly) - - Solger's correspondence with the Rothkegel family (1944-1962) - - Documents about a ship transport from Mombassa (East Africa), curiosities and fossils, to Prof. Dr. Dr. Peter H. H. H. Dr. H. Reck Berlin, Letter to K. Vetters from West Africa (1939) - - International Geological Congress XII Session, South Africa, 1929