http://book.klll.cc/ebooks/subject/8321.opds?sort_order=release_date 2025-08-29T21:31:23Z Books about Geology, Economic (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 2025-08-29T21:31:23Z https://book.klll.cc/ebooks/subject/8321.opds?sort_order=title Sort Alphabetically by Title 2025-08-29T21:31:23Z https://book.klll.cc/ebooks/subject/8321.opds?sort_order=downloads Sort by Popularity 2025-08-29T21:31:23Z https://book.klll.cc/ebooks/71082.opds Political and commercial geology and the world's mineral resources Jul 1, 2023 2025-08-29T21:31:23Z https://book.klll.cc/ebooks/57898.opds Useful Knowledge: Volume 1. Minerals William Bingley 2025-08-29T21:31:23Z https://book.klll.cc/ebooks/27842.opds The Economic Aspect of Geology C. K. Leith