Figure 1 from: Sparrius LB, van Heeswijk J, Dirkse GM, Verhofstad MJJM (2019) The FLORIVON flora survey in the Netherlands between 1902 and 1950. PhytoKeys 135: 11-20. https://doi.org/10.3897/phytokeys.135.30069

Figure 1 Samples of the FLORIVON survey forms: A field form showing a square with a drawing of the surveyed area, space for writing down grid square code ('hokje'), location name, observer name(s) and date, followed by two pages of taxon abbreviations that surveyors had to cross out after observation B written note with header data containing the grid cell code (e.g. L6.12.31), observer's name and the survey date. Stamps confirm that the data have been included in printed atlas volumes.