1
Baskı/Yayın Bilgisi: 1960
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series II 162
2
Baskı/Yayın Bilgisi: 1951
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series II 38
3
Baskı/Yayın Bilgisi: 1937
Superior document: Annals of the Astronomical Observatory of Harvard College 89,10
4
Baskı/Yayın Bilgisi: 1938
Superior document: Annals of the Astronomical Observatory of Harvard College 89,13
5
Baskı/Yayın Bilgisi: 1959
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series II 158
6
Baskı/Yayın Bilgisi: 1945
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series I 273
7
Baskı/Yayın Bilgisi: 1945
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series I 274
8
Baskı/Yayın Bilgisi: 1934
Superior document: Annals of the Astronomical Observatory of Harvard College 89,4
9
Baskı/Yayın Bilgisi: 1950
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series II 35
10
Baskı/Yayın Bilgisi: 1946
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series I 282
11
Baskı/Yayın Bilgisi: 1953
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series II 47
12
Baskı/Yayın Bilgisi: 1960
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series II 161
13
Baskı/Yayın Bilgisi: 1954
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series II 67
14
Baskı/Yayın Bilgisi: 1957
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series II 108
15
Baskı/Yayın Bilgisi: 1956
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series II 80