| 其他書名 | Based on Observations with the Six-inch Transit Circle, 1928-1930, Reduced Without Proper Motion to the Equinox 1925.0 |
| 出版 | U.S. Government Printing Office, 1938 |
| URL | http://books.google.com.hk/books?id=5DfnAAAAMAAJ&hl=&source=gbs_api |
| EBook | FULL_PUBLIC_DOMAIN |