@article{WalterThiel2014,
  author    = {Siegfried Walter and Helmut Thiel},
  title     = {Karl Zappe zum Gedenken},
  journal   = {Naturschutz im Land Sachsen-Anhalt},
  volume    = {32},
  number    = {2},
  pages     = {47 -- 48},
  year      = {2014},
}