http://book.klll.cc/ebooks/author/46646.opds 2025-08-05T03:33:29Z Books by Sperry Gyroscope Company (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 2025-08-05T03:33:29Z https://book.klll.cc/ebooks/52053.opds The Sperry Gyro-Compass Sperry Gyroscope Company