1
2
प्रकाशित: 1946
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series I 278
3
4
प्रकाशित: 1939
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series I 181
5
प्रकाशित: 1944
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series I 263
6
प्रकाशित: 1935
Superior document: Annals of the Astronomical Observatory of Harvard College 89,6
7
प्रकाशित: 1937
Superior document: Annals of the Astronomical Observatory of Harvard College 89,8
8
प्रकाशित: 1946
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series I 281
9
प्रकाशित: 1932
Superior document: Annals of the Astronomical Observatory of Harvard College 89,2
10
प्रकाशित: 1952
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series II 41
11
12
प्रकाशित: 1926
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series I 34
13
प्रकाशित: 1936
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series I 123
14
15
प्रकाशित: 1944
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series I 267
16
प्रकाशित: 1933
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series I 96
17
प्रकाशित: 1947
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series II 18
18
प्रकाशित: 1933
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series I 91
19
प्रकाशित: 1956
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series II 98
20