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1981ApJ...250..513D - Astrophys. J., 250, 513-516 (1981)
HEAO 1 observations of high-energy X-rays from the Seyfert 1 galaxy Mkn 509.
DIL S., PRIMINI F.A., BASINSKA E., BAUTZ M., HOWE S.K., LANG F., LEVINE A.M., LEWIN W.H.G., WORRALL D.M., NOLAN P.L. and MATTESON J.L.
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Simbad objects: 1
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