http://book.klll.cc/ebooks/author/8866.opds 2025-08-20T01:47:24Z Books by Abbe, Ernst (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 2025-08-20T01:47:24Z https://en.wikipedia.org/wiki/Ernst_Abbe See also: en.wikipedia 2025-08-20T01:47:24Z https://de.wikipedia.org/wiki/Ernst_Abbe See also: de.wikipedia 2025-08-20T01:47:24Z https://book.klll.cc/ebooks/19755.opds Gesammelte Abhandlungen III (German) Ernst Abbe