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Bibliography of astronomical publications at the University of Helsinki Observatory and Astrophysics Laboratory 1815-1984<publ. by> Observatory and Astrophysics Laboratory. University of Helsinkied. by E. Isaksson and M. Poutanen Hki : University of Helsinki, 1986 vi, 77 s. ; 30 cm (Report / Observatory and Astrophysics Laboratory. University of Helsinki; 1986, 1) ISBN: 951-45-3996-6 (nid.)
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