http://book.klll.cc/ebooks/author/45234.opds 2025-09-07T00:49:56Z Books by Crosby, William O. (William Otis) (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 2025-09-07T00:49:56Z https://en.wikipedia.org/wiki/William_Otis_Crosby See also: en.wikipedia 2025-09-07T00:49:56Z https://book.klll.cc/ebooks/49271.opds Common Minerals and Rocks William O. Crosby