Inf. Bull. Variable Stars 505-611
1971
- 1971IBVS..505....1S
- The Spectrum of the July 1970 Supernova in M101
- Stienon, F.; Wdowiak, T.
- 1971IBVS..515....1R
- A Possible Fifth Supernova (1969) in the Spiral Galaxy NGC 6946
- Rosino, L.
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