(3YHbQjI YeQ s - (3GdYbGO(B. (3YHGS eMehOs ((3OGQ GdcJGH GdYQHjs (3HjQhJs, 1969)
Keywords: (3GdCOH GdYQHjs; (3YUQ UOQ GdESdGes; (3YeQ Hf GdNWGH (B- (3JQGLe s; (3GdYHbQjGJ s