Steven T. Katz,The Holocaust in Historical Context, 1994, p. 86...indicates (based on 1919 British estimates) that though Ottoman data were generally reliable they did underestimate the Armenian population in 1914...
state.gov
history.state.gov
Papers Relating to the Foreign Relations of the United States, Transmitted to Congress, With the Annual Message of the President, December 2, 1878. Office of the Historian, U.S. Department of State, [2]https://history.state.gov/historicaldocuments/frus1878/d523
