What has the author Demetra Vaka written?

Demetra Vaka has written:

'In pawn to a throne'

'The Unveiled Ladies of Stamboul' -- subject(s): Description, Women

'The grasp of the Sultan'

'Haremlik' -- subject(s): Harems, Women

'In the heart of German intrigue' -- subject(s): Politics and government, Neutrality, World War, 1914-1918

'Some pages from the life of Turkish women' -- subject(s): Women, Harems

'Constantine, king & traitor'