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