Astronomical Observations Made At The Observatory Of Cambridge, Volume 20/fr-ca/astronomical-observations-made-at-the-observatory-of-cambridge-volume-20/10AC6743-6C01-455E-A4B9-4264EB9BCB85.html10AC6743-6C01-455E-A4B9-4264EB9BCB85
Astronomical Observations Made At The Observatory Of Cambridge, Volume 20