(3GdGOeGf (B: (3GSHGHI (B- (3fJGFLg (B- (3YdGLg (B((3OQGSI ejOGfjI(B) / s - (3eMeO SdGeI ZHGQis ([S.N] : (3GdecJH GdLGeYi GdMOjK , s, 1991)
Keywords: (3GdGSQIs; (3GOeGf GdeNOQGJs; (3GdeNOQGJ hGdTHGHs; (3GdGLJeGYs; (3GOeGf GdeTQhHGJ GdQhMjIs; (3GdaSGO GdGLJeGYis; (3GdGOeGfs