http://book.klll.cc/ebooks/author/39245.opds 2025-08-06T09:42:31Z Books by Krueger, William G. (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 2025-08-06T09:42:31Z https://book.klll.cc/ebooks/38109.opds Lecture on Artificial Flight William G. Krueger