stairs.png 1 stairs.png2 image/png Type image/png Dimension Dimension 1280x508 Size File size 979.2 KB Download2 View full-size image1 Linkshttps://www.iaak.uni-bonn.de/bael/en/pictures/studying/stairs.png/image_view_fullscreenhttps://www.iaak.uni-bonn.de/bael/en/pictures/studying/stairs.png/@@download/image/stairs.png