1
Published: 1935
Superior document: Annals of the Astronomical Observatory of Harvard College 90,7
2
Published: 1940
Superior document: Annals of the astronomical observatory of Harvard College 109,1
3
Published: [1943]
Superior document: Annals of the astronomical observatory of Harvard College 109,10
4
Published: 1938
Superior document: Annals of the Astronomical Observatory of Harvard College 90,8
5
Published: 1943
Superior document: Annals of the astronomical observatory of Harvard College 109,9
6
Published: 1934
Superior document: Annals of the Astronomical Observatory of Harvard College 90,5