http://book.klll.cc/ebooks/subject/41181.opds 2025-08-17T18:54:42Z Books about Chemistry -- Popular works (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 2025-08-17T18:54:42Z https://book.klll.cc/ebooks/75670.opds Chemische Unterhaltungen (German) Ludwig Wunder