by Thomas G. Shanks
|
by Neil F. Michelsen
|
Simply Math: A Comprehensive Guide to Easy & Accurate Chart Calculation by Lauran Fowks; Lynn Sellon |
American Ephemeris for the 20th Century: 1900 to 2000 at Midnight/5th Revised by Neil F. Michelsen |
The New American Ephemeris for the 20th Century, 1900-2000 at Midnight by Maritha Pottenger |














