http://book.klll.cc/ebooks/subject/10452.opds 2025-08-30T18:57:01Z Books about Discoveries in science (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 2025-08-30T18:57:01Z https://book.klll.cc/ebooks/30407.opds O odkryciach i wynalazkach (Polish) Bolesław Prus