http://book.klll.cc/ebooks/subject/20501.opds?sort_order=release_date 2025-08-11T13:53:16Z Books about Gyro compass (sorted by release date) Free eBooks since 1971. Project Gutenberg https://book.klll.cc webmaster@gutenberg.org https://book.klll.cc/gutenberg/favicon.ico 25 1 2025-08-11T13:53:16Z https://book.klll.cc/ebooks/subject/20501.opds?sort_order=title Sort Alphabetically by Title 2025-08-11T13:53:16Z https://book.klll.cc/ebooks/subject/20501.opds?sort_order=downloads Sort by Popularity 2025-08-11T13:53:16Z https://book.klll.cc/ebooks/57200.opds The Gyroscopic Compass: A Non-Mathematical Treatment T. W. Chalmers 2025-08-11T13:53:16Z https://book.klll.cc/ebooks/52053.opds The Sperry Gyro-Compass Sperry Gyroscope Company 2025-08-11T13:53:16Z https://book.klll.cc/ebooks/34268.opds Spinning Tops John Perry