http://book.klll.cc/ebooks/author/34252.opds?sort_order=release_date 2026-01-13T17:27:31Z Books by Hittell, John S. (John Shertzer) Free eBooks since 1971. Project Gutenberg https://book.klll.cc webmaster@gutenberg.org https://book.klll.cc/gutenberg/favicon.ico 25 1 2026-01-13T17:27:31Z https://en.wikipedia.org/wiki/John_Shertzer_Hittell See also: en.wikipedia 2026-01-13T17:27:31Z https://book.klll.cc/ebooks/29926.opds Hittel on Gold Mines and Mining John S. Hittell