Whenever you click on the symbol , the details of that item are shown here, and the details of the previous item are moved down in this list.
The number left of the header refers to the number of items in this list.

       (1)   Publication
       Quotation:Additive manufacturing (3D printing), (Additive Fertigungsverfahren (3-D-Druck)), TAB-Fokus Nr. 15, 2017-03, 2364-2629 (ISSN Internet),
       Publication Date:2017-03-01
       Publication Type:policy brief
       Institution:Office of Technology Assessment at the German Bundestag (TAB) (TAB) Details