Armenian Defenders of Baku
<p>Marshall Cavendish Illustrated Encyclopedia of WWI: The Campaign in Armenia,
Marshall Cavendish Corporation, 1984
<a href="//commons.wikimedia.org/wiki/Special:BookSources/0-86307-181-3" title="Special:BookSources/0-86307-181-3">ISBN 0-86307-181-3</a>
</p>
 It's scanned from this book,  they got it from Imperial war museum coll. So, this british tag applies.