Anderson, Poul.
The day the sun stood still : three original novellas of science fiction / by Poul Anderson, Gordon R. Dickson, Robert Silverberg ; with a foreword by Lester del Rey. - Nashville, Tenn. : T. Nelson, [1972]. - x, 209 p.
The day the sun stood still : three original novellas of science fiction / by Poul Anderson, Gordon R. Dickson, Robert Silverberg ; with a foreword by Lester del Rey. - Nashville, Tenn. : T. Nelson, [1972]. - x, 209 p.