(3QLGd hfSGA CfRd Gddg ajge bQBfG (B/s - (3YejQI, YHO GdQMefs ((3HjQhJ (B:s (3OGQ GdLjd,s, 1990)
(3GdecJHI jJhGaQ HgG (B: (3eL(B. 3.s
Keywords: (3GdUMGHI hGdJGHYhf aj GdbQBfs; (3GdUMGHI hGdJGHYhfs -- (3JQGLes