http://book.klll.cc/ebooks/author/46468.opds 2025-09-20T13:16:21Z Books by Herman, Ottó (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 2025-09-20T13:16:21Z https://en.wikipedia.org/wiki/Ott%C3%B3_Herman See also: en.wikipedia 2025-09-20T13:16:21Z https://book.klll.cc/ebooks/51553.opds Birds useful and birds harmful J. A. Owen and Ottó Herman