http://book.klll.cc/ebooks/author/4913.opds 2025-11-14T18:12:24Z Books by Hathaway, Arthur S. (Arthur Stafford) Free eBooks since 1971. Project Gutenberg https://book.klll.cc webmaster@gutenberg.org https://book.klll.cc/gutenberg/favicon.ico 25 1 2025-11-14T18:12:24Z https://en.wikipedia.org/wiki/Arthur_Stafford_Hathaway See also: en.wikipedia 2025-11-14T18:12:24Z https://book.klll.cc/ebooks/9934.opds A Primer of Quaternions Arthur S. Hathaway