@book{ BA91676367,
  author    = "Thulin, Mats",
  title     = "The genus Wahlenbergia S. Lat. (Campanulaceae) in tropical Africa and Madagascar",
  publisher = "[Uppsala University],Distributor, Almqvist & Wiksell",
  year      = "1975",
  series    = "Acta Universitatis Upsaliensis",
  number    = ". Symbolae Botanicae Upsalienses ; 21, 1",
  URL       = "http://ci.nii.ac.jp/ncid/BA91676367"
}