http://book.klll.cc/ebooks/author/52418.opds 2025-08-04T15:13:34Z Books by Trimble, Donald E. (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 2025-08-04T15:13:34Z https://book.klll.cc/ebooks/63396.opds The Geologic Story of the Great Plains Donald E. Trimble