Ethnological Map of European Turkey and her Dependencies at the Time of the Beginning of the War of 1877, by Karl Sax, I. and R. Austro-Hungarian Consul at Adrianople. Published by the Imperial and Royal Geographical Society, Vienna 1878.
Carl Sax
between 1877 and 1878 <div style="display: none;">date QS:P,+1877-00-00T00:00:00Z/8,P1319,+1877-00-00T00:00:00Z/9,P1326,+1878-00-00T00:00:00Z/9</div>
The Bulgarians in their historical, ethnographical and political frontiers, 1917