(3GdJbdHGJ GdGbJUGOjI (B:s (3Hjf GdSjGSI GdeGdjI hGdfbOjI (B/s - (3NVjQ YHGS GdegQs ((3GdQjGV (B:s (3YeGOI TDhf GdecJHGJ (B- (3LGeYI GdQjGV,s, 1981)
(3OQGSI JMdjdjI ehLRI aj EWGQ GdfXQjI GdcjfRjIs
Keywords: (3GdeGdjI GdYGeI hGdJTQjY GdVQjHjs