| 其他書名 | Rudimentary Treatise on Navigation. Part I, How to Keep the Log and how to Work it Off. Part II, On Finding the Latitude and Longitude |
| 出版 | John Weale, 1850 |
| URL | http://books.google.com.hk/books?id=649BAQAAMAAJ&hl=&source=gbs_api |
| EBook | FULL_PUBLIC_DOMAIN |