1
Cyhoeddwyd: 1924
Superior document: Durchmusterung of selected areas
2
Cyhoeddwyd: 1899
Superior document: Annals of the Astronomical Observatory of Harvard College 44,1
3
4
5
6
7
Cyhoeddwyd: 1893
Superior document: Annals of the Astronomical Observatory of Harvard College 19,2
8
9
Cyhoeddwyd: 1923
Superior document: Durchmusterung of selected areas
10
11
12
Cyhoeddwyd: 1909
Superior document: Annals of the Astronomical Observatory of Harvard College 70
13
14
15
16
17
18
Cyhoeddwyd: 1888
Superior document: Annals of the Astronomical Observatory of Harvard College 13,2
19
Cyhoeddwyd: 1891
Superior document: Annals of the Astronomical Observatory of Harvard College 26,1
20
Cyhoeddwyd: 1901
Superior document: Annals of the Astronomical Observatory of Harvard College 45