http://book.klll.cc/ebooks/author/52048.opds?sort_order=release_date 2025-08-27T21:53:33Z Books by Mattison, Ray H. (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 2025-08-27T21:53:33Z https://book.klll.cc/ebooks/author/52048.opds?sort_order=title Sort Alphabetically by Title 2025-08-27T21:53:33Z https://book.klll.cc/ebooks/author/52048.opds?sort_order=downloads Sort by Popularity 2025-08-27T21:53:33Z https://book.klll.cc/ebooks/66011.opds Devils Tower National Monument: A History Ray H. Mattison 2025-08-27T21:53:33Z https://book.klll.cc/ebooks/62641.opds The History of Badlands National Monument and the White River (Big) Badlands of South Dakota Ray H. Mattison and Robert A. Grom