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Identification of a complete sample of northern ROSAT All-Sky Survey X-ray sources - II. The optical observations

F.-J. Zickgraf, I. Thiering, J. Krautter, I. Appenzeller, R. Kneer, W. H. Voges, B. Ziegler, C. Chavarria, A. Serrano, R. Mujica et al. (2 more)

Astron. Astrophys. Suppl. Ser., 123 1 (1997) 103-114

Published online: 15 May 1997

DOI: 10.1051/aas:1997347

F.-J. Zickgraf

I. Thiering

J. Krautter

I. Appenzeller

R. Kneer

W. H. Voges

B. Ziegler

C. Chavarria

A. Serrano

R. Mujica

M. Pakull

J. Heidt

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