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Cosmic X-ray surveys of distant active galaxies |
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| Authors: | W. N. Brandt D. M. Alexander |
| Affiliation: | 1. Department of Astronomy and Astrophysics and the Institute for Gravitation and the Cosmos, The Pennsylvania State University, 525 Davey Lab, University Park, PA, 16802, USA 2. Department of Physics, Durham University, Durham, DH1 3LE, UK |
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