Wielkopolski szlak wiatraczny, 2009.
see also http://www.wiatrakmuzeum.rydzyna.pl/
This is a map, published in 2009, describing 50 windmills and motormills in the Polish province of Wielkopolski.
Many mills are ruins and about to disappear. All fifty mills have a picture and a short description.
Input: Ton Meesters