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1989AN....310..187B - Astron. Nachr., 310, 187-193 (1989)
On the cosmological evolution of the quasar population.
BOLLER T., LORENZ H., AFANAS'EV V.L., DODONOV S.N. and TEREBIZH V.Y.
Journal keyword(s):
Nomenclature: Table 4: Boller NNN N=6 among 254. Fig.2: [BJK80] N Nos 5, 6 are new
Simbad objects: 9
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