(3GdGYeGd GdcGedI dYdi eHGQc (B/ s - (3eMeO YeGQIs ([S.N] : (3GdeDSSI GdYQHjI ddOQGSGJ hGdfTQ , s, 1981)
Keywords: (3GdYUQ GdMOjKs; (3eUQs; (3GdGMhGd GdGLJeGYjIs; (3GdGMhGd GdGbJUGOjIs; (3GdJGQjNs; (3Ydi eHGQcs