@article{Gess2008,
  author    = {Fred W. Gess},
  title     = {Some aspects of an ethological study of the aculeate wasps and the bees of a karroid area in the vicinity of Grahamstown, South Africa},
  journal   = {Annals of the cape provincial museums / Natural history},
  volume    = {14},
  number    = {1},
  pages     = {1 -- 80},
  year      = {2008},
}