Bibliothek geographischer Handbücher. Herausgegeben von ... F. Ratzel
A volume from the Bibliothek geographischer Handbücher, a German series of geographical handbooks edited by Friedrich Ratzel and published in 1885 for students and working geographers. The plates are numbered line diagrams of slope and valley profiles, river gradient curves and terrace steps, with hatched and stippled fills marking eroded and deposited material, and letter labels along each line.
