Karte: Die Einführung der Telefonkarte in Deutschland
<a href="https://de.wikipedia.org/wiki/User:Chumwa" class="extiw" title="de:User:Chumwa">Maximilian Dörrbecker</a> (<a href="https://de.wikipedia.org/wiki/User:Chumwa" class="extiw" title="de:User:Chumwa">Chumwa</a>)
CC BY-SA 2.5
<p><span class="int-own-work" lang="en">Own work</span>, using
</p>
<ul><li><a href="//commons.wikimedia.org/wiki/File:Germany,_Federal_Republic_of_location_map_January_1957_-_October_1990.svg" title="File:Germany, Federal Republic of location map January 1957 - October 1990.svg">background map</a> by <a href="//commons.wikimedia.org/wiki/User:TUBS" title="User:TUBS">TUBS</a></li>
<li><a href="//commons.wikimedia.org/wiki/File:DB_Intercity_Network_1985.svg" title="File:DB Intercity Network 1985.svg">ICE train network</a></li>
<li><a href="//commons.wikimedia.org/wiki/File:RWB_Flughafen(L).svg" title="File:RWB Flughafen(L).svg">airplane symbol</a></li></ul>