1
Vydáno: 1943
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series I 253
2
Vydáno: 1946
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series I 286
3
4
5
6
Vydáno: 1962
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series II 186
7
Vydáno: 1962
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series II 189
8
Vydáno: 1958
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series II 132
9
Vydáno: 1956
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series II 91
10
Vydáno: 1944
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series I 265
11
Vydáno: 1961
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series II 173
12
13
Vydáno: 1945
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series II 9
14
Vydáno: 1944
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series I 268
15
Vydáno: 1953
Superior document: Annals of the astronomical observatory of Harvard College 113,2
16
Vydáno: 1954
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series II 60/61
17
Vydáno: 1955
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series II 77/78
18
Vydáno: 1937
Superior document: Annals of the Astronomical Observatory of Harvard College 89,9
19
Vydáno: 1947
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series I 293
20
Vydáno: 1939
Superior document: Annals of the astronomical observatory of Harvard College 108,1