Lange, Erich (1889 - 1965) Prof. Dr.phil.; Professor of Fuel Geology 1946 President of the German Geological Survey; Director of the Geological Service of the GDR The estate contains: Excerpts from the file 1957 "Preparation of the commemorative event 10 years StGK (Staatliche Geologische Kommission) (contains among other things: material, elaborations and handwritten notes) Correspondences Personal letter of Gottlieb A. Seberna Handwritten notes among other things from and to geological books, to Cameroon, manuscripts to geological observation in French, German and English. Colonies (e.g. East-Adamaua), excerpts from the journal of the German Geological Society vol. 84(1932), photographs of tree trunks in a basalt stream near Meiganga

Contains all preliminary work and stages as well as the materials collected in this context, including correspondence, and also documents for the reception of individual articles or the complete work:A. Preparatory work, compilations of literature, material collections, excerpts from archives and books, card indexes, photocopies, newspaper clippingsB. Drawings, sketches, photos, microfilmsC. Publications, lectures, lectures, speeches and reports, proofs/correction sheetsD. Publication listsE. Special editions, newspaper clippings and copies (of Alfred Weber's publications)F. Reviews or other statements (on Alfred Weber's publications or lectures)