O.P. · Otto Albert Julius Penzig · Otto Pankok
Edagricole · Kessinger Publishing, LLC
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Die Fortschritte Der Flora Des Krakatau | 978-1-161-09101-4 (1-161-09101-7) | 2010 |
| Flora popolare italiana. Opera botanica: 2 | 978-88-206-1535-2 (88-206-1535-5) |