(3GdeOhfI GdPgHjI(B: (3GdeTcdGJ GdYedjI ai GdJTQjYGJ GdVQjHjI (B/ s - (3GMeO cGed GHhGdSYhOs ([S.N] : (3OGQ GdacQ GdLGeYi , s, 1990)
Keywords: (3GdbGfhfs; (3GdVQGFHs; (3VQGFH GdJQcGJs; (3VQGFH GdONds; (3VQGFH GdGQHGM GdJLGQjIs