http://book.klll.cc/ebooks/author/45985.opds?sort_order=release_date 2025-11-16T02:21:14Z Books by Faucher, Léon Free eBooks since 1971. Project Gutenberg https://book.klll.cc webmaster@gutenberg.org https://book.klll.cc/gutenberg/favicon.ico 25 1 2025-11-16T02:21:14Z https://en.wikipedia.org/wiki/L%C3%A9on_Faucher See also: en.wikipedia 2025-11-16T02:21:14Z https://book.klll.cc/ebooks/50581.opds Remarks on the production of the precious metals Léon Faucher