http://book.klll.cc/ebooks/author/40682.opds 2025-08-16T20:16:32Z Books by Helbig, Georg (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 2025-08-16T20:16:32Z https://book.klll.cc/ebooks/author/40682.opds?sort_order=title Sort Alphabetically by Title 2025-08-16T20:16:32Z https://book.klll.cc/ebooks/author/40682.opds?sort_order=release_date Sort by Release Date 2025-08-16T20:16:32Z https://book.klll.cc/ebooks/40543.opds Die Zelle (German) Fritz Kahn 2025-08-16T20:16:32Z https://book.klll.cc/ebooks/52373.opds Die Milchstraße (German) Fritz Kahn