The X-Ray source in NGC 1851 /
Bolton, A. J.
Mallia, E. A.
University of Oxford.Observatory.
[Oxford : University of Oxford, Department of Astrophysics,
1977]
Reprinted from: Astronomy and astrophysics, v.59 (1977), pp.L23-L26.
"Letter to the editor."
Astrophysics.
Stars
NGC 1851 (Globular cluster)