Yazar
georgetown college observatory washington
7 cilt bulundu.
Georgetown College Observatory (Washington, D.C.) · Yayınevi bilinmiyor
147 sayfa · 1901
Variable stars
Georgetown College Observatory (Washington, D.C.) · Stormont & Jackson, printers
160 sayfa · 1894
Photochronograph
Georgetown College Observatory (Washington, D.C.) · Georgetown College Observatory
15 sayfa · 1958
Solar eclipses
Georgetown College Observatory (Washington, D.C.) · E. Dunigan & brother
215 sayfa · 1852
Kategori yok
Georgetown College Observatory (Washington, D.C.) · Gergetown university press
Sayfa sayısı yok · 1901
New Stars
Georgetown College Observatory (Washington, D.C.) · Georgetown university press
33 sayfa · 1901
Variable stars
G. A. Fargis, Georgetown College Observatory (Washington, D.C.) · Georgetown College
Sayfa sayısı yok · 1896
Stars / Observations / Motion in line of sight / Photochronograph