@article{KnoblochPieper2009,
  author    = {Eberhard Knobloch and Herbert Pieper},
  title     = {Die Fußnote {\"u}ber Geognosia in Humboldts Florae Fribergensis specimen},
  volume    = {VIII},
  number    = {14},
  pages     = {41 -- 56},
  year      = {2009},
}