12.10.1987, GDR, Berlin, Berlin - Physiklehrer erlaeutert an der Tafel ein Schaltbild. 00S871012A007CAROE.JPG GT [MODEL RELEASE: NO, PROPERTY RELEASE: NO (c) caro images / Klaus Fischer / Archiv Frank Sorge, http://www.caro-images.com, [email protected] - In case of using the picture for any non-editorial purpose, please contact the agency - the picture is subject to royalty!]