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- [21] REDSHIFTS OF QUASI-STELLAR RADIO SOURCES 3C 334 3C 345 3C 380 AND A DISCUSSION OF POSSIBLE REDSHIFT OF 3C 446 ASTROPHYSICAL JOURNAL, 1965, 142 (04): : 1674 - &
- [26] A DISTANCE LIMIT FOR QUASI-STELLAR OBJECT 3C 147 ASTROPHYSICAL JOURNAL, 1967, 150 (2P1): : 711 - &