(3OQGSI GhVGY WdGH OhQ GdeYdejf hGdeYdeGJ (B1973 s - (3UjGM, GdGH fHjd s; (3GdeQcR GdJQHhj ddHMhK hGdGfeGAs ((3HjQhJs (3GdeQcR GdJQHhj ddHMhK hGdGfeGAs, 1973)
Keywords: (3GdJQHjI hGdJYdje (B- (3OhQ GdeYdejf hGdYdeGJ (B- (3OQGSI s; (3OQGSI (B- (3WdGH (B- (3OhQ GdeYdejf hGdYdeGJ (B- (3dHfGfs