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- catalog contributor b3304690.
- catalog created "1991.".
- catalog date "1991".
- catalog date "1991.".
- catalog dateCopyrighted "1991.".
- catalog description "Includes bibliographical references.".
- catalog description "Thesis (Ph. D.)--Harvard University, 1991.".
- catalog extent "x, 177 leaves :".
- catalog issued "1991".
- catalog issued "1991.".
- catalog language "eng".
- catalog subject "Active galactic nuclei.".
- catalog subject "Cosmic background radiation.".
- catalog subject "Cosmic rays.".
- catalog subject "Gamma rays.".
- catalog subject "X-ray astronomy.".
- catalog title "The origins of the cosmic X-ray and gamma-ray backgrounds / by Robert Derward Rogers.".
- catalog type "text".