http://book.klll.cc/ebooks/subject/6127.opds 2025-08-10T08:05:13Z Books about Minerals -- Catalogs and collections (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 2025-08-10T08:05:13Z https://book.klll.cc/ebooks/20159.opds Catálogo Instructivo de las Colecciones Mineralógicas (Spanish) Enrique Martín Hermitte and Guillermo Bodenbender