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- [7] SPECTROSCOPIC OBSERVATIONS OF NOVA CYGNI 1975 - CORONAL LINE PHASE ASTROPHYSICAL JOURNAL, 1977, 213 (01): : 132 - 137
- [8] POLARIMETRIC AND PHOTOMETRIC OBSERVATIONS OF NOVA-CYGNI 1975 = V1500 CYGNI ASTRONOMICHESKII ZHURNAL, 1977, 54 (03): : 612 - 619