How many Stars do we still See Pikall, H. ; Hron, J. ; Netopil, M. ; Posch, T. ; Wuchterl, G. ; Zeitlinger, N. Abstract Publication: Light Pollution: The Global View Pub Date: April 2003 DOI: 10.1007/978-94-017-0125-9_25 Bibcode: 2003ASSL..284..287P