(3GdQMdI GdGhdi ddHMK Yf jfGHjY GdHMQ GdGHjV (B((3Gdfjd GdGHjV(B) / s - (3eMeO eSYhOs ([S.N] : (3ecJHI eOHhdi , s, 1993)
Keywords: (3eUQs; (3GdHYKGJ GdGSJcTGajIs; (3Gdfjd GdGHjVs