|←Author Index: Kr||Otto Krümmel
Ph.D. Professor of Geography in the University of Kiel, and Lecturer in the Imperial Navai Academy. Author of Handbuch der Ozeanographie, &c
This author wrote articles for the 1911 Encyclopædia Britannica.
Articles attributed to this author are designated in EB1911 by the initials "O. K."
- “Krümmel, Otto,” The New International Encyclopædia. New York: Dodd, Mead and Co., 1905.
- “Krümmel, Otto,” Encyclopædia Britannica (12th ed.), 1922.