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