@article{FritschRich2008,
  author    = {Felix Eugene Fritsch and Florence Rich},
  title     = {Contributions to our knowledge of the freshwater algae of Africa : 4. Freshwater and subaerieal algae from Natal},
  journal   = {Transactions of the Royal Society of South Africa},
  volume    = {11},
  pages     = {297 -- 398},
  year      = {2008},
}