Erhard Keller, Ingrid Becker
Unknown author<span style="display: none;">Unknown author</span>
<a rel="nofollow" class="external autonumber" href="http://colnect.com/en/stamps/stamp/444298-Becker_Keller_Emblems_of_Sapporo_and_Munich-German_Olympic_champions-Yemen_Arab_Republic">[1]</a>