WEBB, JR. (1990). THE NATURE OF THE OPTICAL VARIATIONS OF SEYFERT-GALAXY 3C-120
.
ASTRONOMICAL JOURNAL, 99(1), 49-52. 10.1086/115311
WEBB, JR. (1990). THE NATURE OF THE OPTICAL VARIATIONS OF SEYFERT-GALAXY 3C-120
. ASTRONOMICAL JOURNAL, 99(1), 49-52. 10.1086/115311