1
प्रकाशित: 1956
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series II 100
2
प्रकाशित: 1955
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series II 68
3
प्रकाशित: 1956
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series II 87
4
प्रकाशित: 1946
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series I 284
5
प्रकाशित: 1939
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series I 175
6
प्रकाशित: 1945
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series I 275
7
प्रकाशित: 1939
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series I 180
8
प्रकाशित: 1944
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series I 260
9
प्रकाशित: 1936
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series I 122
10
प्रकाशित: 1952
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series II 42
11
प्रकाशित: 1957
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series II 110
12
प्रकाशित: 1952
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series II 45
13
प्रकाशित: 1954
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series II 66
14
15
प्रकाशित: 1938
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series I 144
16
प्रकाशित: 1945
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series I 273
17
प्रकाशित: 1945
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series I 274
18
प्रकाशित: 1956
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series II 99
19
प्रकाशित: 1956
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series II 86