Official Seal of Emperor Yohannes II of Ethiopia
Unknown author<span style="display: none;">Unknown author</span>
before 1889 <div style="display: none;">date QS:P,+1889-00-00T00:00:00Z/7,P1326,+1889-00-00T00:00:00Z/9</div>
<a href="https://en.wikipedia.org/wiki/Richard_Pankhurst" class="extiw" title="w:Richard Pankhurst">Richard Pankhurst</a>, <i>History of the Economy of Ethiopia</i>