(3GdZGQI Ydi GdJQGK GdESdGej (B/s - (3SdWGf, LeGd aDGOs ((3GdbGgQI (B:s (3ecJHI GdSfI,s, 1990)
Keywords: (3GdESdGe hGdeSjMjIs; (3GdJQGK GdESdGejs; (3GdOYhI GdESdGejIs