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- [4] ARE FORBIDDEN LINES PRESENT IN THE OPTICAL-SPECTRUM OF THE QSO 3C 273 ASTROPHYSICAL JOURNAL, 1984, 283 (02): : 529 - 531
- [5] CHARACTER OF OPTICAL VARIABILITY OF QUASAR 3C-273 ASTROPHYSICAL JOURNAL, 1973, 182 (02): : L53 - L56
- [7] SPECTRUM AND ANGULAR STRUCTURE OF 3C-273 AT LOW FREQUENCIES ASTROPHYSICAL LETTERS, 1969, 4 (06): : 211 - &
- [8] INTERSTELLAR ABSORPTION-LINES IN THE SPECTRUM OF 3C-273 ASTROPHYSICAL JOURNAL, 1983, 274 (01): : 136 - 140
- [10] 3C-273 - X-RAY VARIABILITY, SPECTRUM, AND POSITION ASTROPHYSICAL JOURNAL, 1979, 230 (01): : L5 - &