http://book.klll.cc/ebooks/subject/9974.opds 2025-08-27T12:52:33Z Books about Curves (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 2025-08-27T12:52:33Z https://book.klll.cc/ebooks/29805.opds Étude des Élassoïdes, ou, Surfaces A Courbure Moyenne Nulle (French) Albert Ribaucour