Observational Cosmology from Gauss to Sandage Heller, M. ; Flin, P. ; Golda, Z. ; Maslanka, K. ; Ostrowski, M. ; Rudnicki, K. ; Sierotowicz, T. Abstract Publication: Acta Cosmologica Pub Date: 1989 Bibcode: 1989AcC....16...87H