1999 (3fUQ HdG MQH (B/ s - (3eMeO YHOGdMdje GHhZRGdI(B((3GYOGO(B)s; (3fjcShf (B, (3QjJTGQOs ([S.N] : (3eQcR GdGgQGe ddJQLeI hGdfTQ , s, 1988)
Keywords: (3GdGJMGO GdShajJis; (3GdhdGjGJ GdeJMOI GdGeQjcjIs; (3GdSjGSI GdOhdjIs; (3GdYdGbGJ GdNGQLjIs; (3Gdbhi GdYXeis