http://book.klll.cc/ebooks/author/57369.opds 2025-08-26T09:26:19Z Books by Hopkins, Arthur John (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 2025-08-26T09:26:19Z https://book.klll.cc/ebooks/74154.opds The reaction between manganese dioxide and potassium permanganate Arthur John Hopkins