1
Published: 1939
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series I 186
2
Published: 1939
Superior document: Apsidal motion in binary stars [1]
3
4
5
6
Published: 1939
Superior document: Reprints / The Astronomical Observatory of Harvard College : Series I 174
7
Published: 1934
Superior document: Annals of the Astronomical Observatory of Harvard College 90,6