Stellar parallaxes derived from photographs made with the forty-inch refractor
Yerkes Observatory; Slocum, F. (Frederick), 1873-1944; Mitchell, S. A. (Samuel Alfred), 1874-1960; Lee, Oliver Justin, 1881-1964; Joy, Alfred Harrison, 1882-; Van Biesbroeck, George, 1880-1974; Pettit, Hannah Bard Steele, 1886-