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1973ApJ...183..777B - Astrophys. J., 183, 777-782 (1973)
Observations of QSOs in the direction of clusters of galaxies.
BAHCALL N.A., BAHCALL J.N. and SCHMIDT M.
Journal keyword(s):
Nomenclature: Table 2: NAB HHMM+DD N=9
Simbad objects: 12
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