http://book.klll.cc/ebooks/author/46468.opds?sort_order=release_date 2025-11-17T03:14:27Z Books by Herman, Ottó Free eBooks since 1971. Project Gutenberg https://book.klll.cc webmaster@gutenberg.org https://book.klll.cc/gutenberg/favicon.ico 25 1 2025-11-17T03:14:27Z https://en.wikipedia.org/wiki/Ott%C3%B3_Herman See also: en.wikipedia 2025-11-17T03:14:27Z https://book.klll.cc/ebooks/51553.opds Birds useful and birds harmful J. A. Owen and Ottó Herman