(3GdaQbI Hjf GdRhLjf hCMcGegG aj ePgH Cgd GdSfI (B/s - (3aQL, GdSjOs ((3GdefUhQI, eUQ (B:s (3OGQ GdhaGA ddWHGYI hGdfTQ,s, 1990)
(3jTJed Ydi EQLGYGJ HHdjhLQGajI(B.s
Keywords: (3GdWdGb (B((3abg ESdGej(B)s; (3GdCMhGd GdTNUjIs