Catalogue of the mean declination of 2018 stars between 0h̳ to 2h̳ and 12h̳ to 24h̳ right ascension, and 10⁰ and 70⁰ of north declination, for January 1, 1875
United States. Geological surveys west of the 100th Meridian; Safford, Truman Henry, 1836-1901