http://book.klll.cc/ebooks/subject/20054.opds?sort_order=release_date 2025-08-14T17:37:34Z Books about Sound production by animals (sorted by release date) Free eBooks since 1971. Project Gutenberg https://book.klll.cc webmaster@gutenberg.org https://book.klll.cc/gutenberg/favicon.ico 25 1 2025-08-14T17:37:34Z https://book.klll.cc/ebooks/subject/20054.opds?sort_order=title Sort Alphabetically by Title 2025-08-14T17:37:34Z https://book.klll.cc/ebooks/subject/20054.opds?sort_order=downloads Sort by Popularity 2025-08-14T17:37:34Z https://book.klll.cc/ebooks/67517.opds Apes and Monkeys: Their Life and Language R. L. Garner 2025-08-14T17:37:34Z https://book.klll.cc/ebooks/33421.opds The Speech of Monkeys R. L. Garner