(3ehShYI GdYde hGdJcfhdLjG GdejSQI (B- ( 9 ) : (3GdSajfI s - (3SYO GdOjf(B. (3YUGes ((3OGQ GdcJGH GdeUQjs (3GdbGgQIs, 1991)
Keywords: (3GdYdhe GdJWHjbjIs; (3ehShYGJ GdSajfI s