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