SIMBAD references

1972ATsir.675....1L - Astron. Tsirk., 675, 1-3 (1972)

Photometric observations of BD +34 3815 (Cyg X-1) in the interval 3600-2200 Angstroms.

LYUTYI V.M., MOROZ V.I. and KHROMOV G.S.

Journal keyword(s):

Simbad objects: 1

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