1
Được phát hành: 1913
Superior document: Photometric observations made with the fifteen inch east equatorial during the years ...
2
3
4
Được phát hành: 1909
Superior document: Photometric observations made with the fifteen inch east equatorial during the years ...
5
Được phát hành: 1890
Superior document: Annals of the Astronomical Observatory of Harvard College 24
6
Superior document: Annals of the Astronomical Observatory of Harvard College 23
7
Được phát hành: 1890
Superior document: Discussion of observations made with the meridian photometer during the years 1882 to 1888 1
8
Được phát hành: 1899
Superior document: Discussion of observations made with the meridian photometer during the years 1882 to 1888 2
9
Được phát hành: 1900
Superior document: Annals of the astronomical observatory of Harvard College 37,1