@misc{Portmann2017,
  author    = {Felix Portmann},
  title     = {Global irrigation in the 20th century: extension of the WaterGAP Global Irrigation Model (GIM) with the spatially explicit Historical Irrigation Data set (HID)},
  booktitle = {Frankfurt Hydrology Paper ; 18},
  institution = {Geowissenschaften},
  series    = {Frankfurt Hydrology Paper},
  number    = {18},
  type      = {workingpaper},
  pages     = {131},
  year        = {2017},
}