The bridges, passages, tunnels and underpasses are weak links and can be dangerous in times of war or peace, and therefore their classification and identification require particular attention to their characteristics.
Safavi,S. Y. (2004). Introduction to Political Geography (Part XVII). Scientific- Research Quarterly of Geographical Data (SEPEHR), 13(49), 6-10.
MLA
Safavi,S. Y. . "Introduction to Political Geography (Part XVII)", Scientific- Research Quarterly of Geographical Data (SEPEHR), 13, 49, 2004, 6-10.
HARVARD
Safavi S. Y. (2004). 'Introduction to Political Geography (Part XVII)', Scientific- Research Quarterly of Geographical Data (SEPEHR), 13(49), pp. 6-10.
CHICAGO
S. Y. Safavi, "Introduction to Political Geography (Part XVII)," Scientific- Research Quarterly of Geographical Data (SEPEHR), 13 49 (2004): 6-10,
VANCOUVER
Safavi S. Y. Introduction to Political Geography (Part XVII). SEPEHR, 2004; 13(49): 6-10.
