Washington, D.C.: CIA., 1971.
Washington, D.C.: CIA., 1963.
Journal of Race Development, Vol. 3, No. 3 (January, 1913), pp. 316-342.
London: Trubner, 1867.
A Google book.
Shanghai: Kelly and Walsh, 1912.
Very useful for terms and titles used in Qing dynasty government.
London: Oriental Translation Fund, 1831,
New York: Fleming H. Revell, 1901.
A Google book.
New York: Scribner, 1901.
A Google book.
Journal of the North China Branch of the Royal Asiatic Society, Vol. XVII (n.s.), 1882, pp. 221-235.
A Google book.
New York: Abingdon Press, 1922.
A Google book.
A Google book