Laffan, R. G. D. 1887- The Serbs : : the guardians of the gate / [electronic resource] / R.G.D. Laffan.. — New York : : Dorset Press,, 1989.. — 299 p. : : 3 maps ; 21 cm.
Originally published: The guardians of the gate : historical lectures on the Serbs. Oxford : Clarendon Press, 1918.
Includes bibliographical references (p. [9]-11) and index.