@book{BergmannSchaeferBlomeetal.2007,
  author    = {Ludwig Bergmann and Clemens Sch{\"a}fer and Hans-Joachim Blome and Heinrich Gobrecht},
  title     = {Lehrbuch der Experimentalphysik ; Bd. 8 : Sterne und Weltraum},
  editor    = {Wilhelm Raith},
  isbn      = {3110151731},
  year      = {2007},
}