http://book.klll.cc/ebooks/subject/37570.opds 2025-09-13T00:41:57Z Books about Rocks (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 2025-09-13T00:41:57Z https://book.klll.cc/ebooks/67685.opds Rocks and Their Origins Grenville A. J. Cole