This page could use some help from Dutch speakers!! The author Ad van Liempt has written more about this and has a book available on google books here:[1] but they are in Dutch and not easy to translate. 209.60.128.202 (talk) 15:26, 27 April 2016 (UTC)
Would like to use this picture but first will find a reliable source [2] 209.60.128.202 (talk) 15:31, 27 April 2016 (UTC)
![[2]](http://assets.kompasiana.com/statics/crawl/555dea210423bdf80e8b4570.jpeg){kind=link}