(3GdeOgT (B/s - (3GHf GdLhRj, YHO GdQMef Hf Ydj Hf eMeO,s 508-597 (3gLQjs ((3HjQhJ (B:s (3OGQ GdLjd,s, 1977)
(3jTJed Ydi EQLGYGJ HHdjhLQGajI(B.s
Keywords: (3GdOYhI GdESdGejIs; (3GdhYX hGdEQTGOs