SIMBAD references

1996MmSAI..67.1039R - Mem. Soc. Astron. Ital., 67, 1039-1046 (1996)

Preliminarly results from an ASCA observation of the ultrasoft X-ray binary 4U 1957+11.

RICCI D., ASAI K., ISRAEL G.L., MEREGHETTI S., MITSUDA K., PARMAR A.N. and STELLA L.

Journal keyword(s):

Simbad objects: 7

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