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Steps toward determination of the size and structure of the broad-line region in active nuclei. 7: Variability of the optical spectrum of NGC 5548 over years (1994)
Journal Article
Peterson, B., Berlind, P., Bertram, R., Bochkarev, N., Bond, D., Brotherton, M., …Younger, P. (1994). Steps toward determination of the size and structure of the broad-line region in active nuclei. 7: Variability of the optical spectrum of NGC 5548 over years. Astrophysical Journal, 425, 622-634. https://doi.org/10.1086/174009