Pettit, Hannah Bard Steele books & textbook
Parallaxes of fifty-two stars
Van Biesbroeck, George Pettit, Hannah Bard Steele
Ulan Press /2012-08-31 Paperback / 54 Pages
Stellar parallaxes derived from photographs made with the forty-inch refractor
Observatory, Yerkes Slocum, F 1873-1944 Mitchell, S A. 1874-1960 Lee, Oliver Justin Joy, Alfred Harrison Van Biesbroeck, George Pettit, Hannah Bard Steele
Ulan Press /2012-08-31 Paperback / 86 Pages
Publications Of The Yerkes Observatory V4, Part 3: Parallaxes Of Fifty-Two Stars (1920)
Van Biesbroeck, George Pettit, Hannah Bard Steele
Kessinger Publishing /2010-09-10 Paperback / 44 Pages
isbn-10: 1164145320 / isbn-13: 9781164145325
