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1987A&A...176..197C - Astronomy and Astrophysics, volume 176, 197-209 (1987)
The radio to X-ray continuum emission of the quasar 3C 273 and its temporal variations.
COURVOISIER T.J.-L., TURNER M.J.L., ROBSON E.I., GEAR W.K., STAUBERT R., BLECHA A., BOUCHET P., FALOMO R., VALTONEN M. and TERASRANTA H.
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