Number | Name | Date | Kind |
---|---|---|---|
D151204 | Adamson | Oct 1948 | |
D232219 | Strong et al. | Jul 1974 | |
D232706 | Strong et al. | Sep 1974 | |
D260743 | Haller | Sep 1981 | |
D271288 | Bernick | Nov 1983 | |
D297512 | Kowalenko et al. | Sep 1988 | |
1370401 | Becker | Mar 1921 | |
2443468 | Madden | Jun 1948 | |
2594877 | Crockett | Apr 1952 | |
4124945 | Totten | Nov 1978 | |
4885731 | Massaro | Dec 1989 |
Number | Date | Country |
---|---|---|
0215391 | Mar 1987 | EPX |
438158 | May 1912 | FRX |
Entry |
---|
R. A. Strong, Star Tracker An Aid for Use in Learning About Time and Space, Allentown Press, Md., 1969, pp. 1-7. |