The Positions and proper motions of the principal stars in the Cluster of Coma Berenices ; as deduced from measurements of the Rutherfurd photographs

von Kretz, Walter C.
Veröffentlicht in Annals of the New York Academy of Sciences, Vol. XII, S. 344-478 (1900)

The positions and proper motions of the principal stars in the cluster of Coma Berenices as deduced from measurements of the Rutherfurd photographs

von Kretz, Walter C.
Veröffentlicht 1900