http://book.klll.cc/ebooks/subject/38607.opds 2025-08-12T16:25:06Z Books about Helgoland (Germany) (sorted by popularity) Free eBooks since 1971. Project Gutenberg https://book.klll.cc webmaster@gutenberg.org https://book.klll.cc/gutenberg/favicon.ico 25 1 2025-08-12T16:25:06Z https://book.klll.cc/ebooks/69903.opds Deutsche Nordseeküste: Friesische Inseln und Helgoland. (German) Hippolyt Julius Haas