(3SGejI agei(B: (3ef edaGJ GdeNGHQGJ GdeUQjI (B/ s - (3UdGM eQSis ((3GdbGgQI (B: s (3GHhddh ddfTQ hGdJhRjY , s, 1990)
Keywords: (3GdYUQ GdMOjKs; (3JGQjNs; (3GdeNGHQGJs; (3eUOGJ hGMReI ddQjGMs; (3GdLGShSjIs