1
2
Izdano: 1955
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series II 68
3
Izdano: 1956
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series II 87
4
Izdano: 1946
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series I 284
5
Izdano: 1939
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series I 175
6
Izdano: 1945
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series I 275
7
Izdano: 1939
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series I 180
8
Izdano: 1944
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series I 260
9
Izdano: 1936
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series I 122
10
Izdano: 1952
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series II 42
11
Izdano: 1957
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series II 110
12
Izdano: 1952
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series II 45
13
Izdano: 1954
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series II 66
14
15
Izdano: 1938
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series I 144
16
Izdano: 1945
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series I 273
17
Izdano: 1945
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series I 274
18
Izdano: 1956
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series II 99
19
Izdano: 1956
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series II 86