(3JSdjI Cgd GdeUGFH (B/s - (3GdefHLj, eMeO Hf eMeO Hf eMeO,s (3J(B. 785 (3g`(B.s; (3feQ, eMehOs ((3HjQhJ(B:s (3GdcJGH GdYGdej,s, 1988)
Keywords: (3GdhYX hGdEQTGOs; (3GdKhGH hGdYbGHs