http://book.klll.cc/ebooks/author/53464.opds?sort_order=title2025-08-29T20:46:12ZBooks by Illinois State Geological Survey (sorted alphabetically)Free eBooks since 1971.Project Gutenberghttps://book.klll.ccwebmaster@gutenberg.orghttps://book.klll.cc/gutenberg/favicon.ico2512025-08-29T20:46:12Zhttps://book.klll.cc/ebooks/author/53464.opds?sort_order=release_dateSort by Release Date2025-08-29T20:46:12Zhttps://book.klll.cc/ebooks/author/53464.opds?sort_order=downloadsSort by Popularity2025-08-29T20:46:12Zhttps://book.klll.cc/ebooks/66308.opdsGuide to Rocks and Minerals of IllinoisIllinois State Geological Survey2025-08-29T20:46:12Zhttps://book.klll.cc/ebooks/65704.opdsGuide to the Geologic Map of IllinoisIllinois State Geological Survey2025-08-29T20:46:12Zhttps://book.klll.cc/ebooks/66317.opdsInside Illinois: Mineral ResourcesIllinois State Geological Survey