Soper 1992, p. 264. Soper, Karl Wheele (1992). "National Security". In Curtis, Glenn E. (ed.). Yugoslavia: a country study. Area Handbook (3rd ed.). Washington, D.C.: Library of Congress. LCCN91040323. Retrieved 19 October 2021.
lccn.loc.gov
Soper 1992, p. 264. Soper, Karl Wheele (1992). "National Security". In Curtis, Glenn E. (ed.). Yugoslavia: a country study. Area Handbook (3rd ed.). Washington, D.C.: Library of Congress. LCCN91040323. Retrieved 19 October 2021.
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