(3YHO GdfGUQ h GdjSGQ GdeUQj (B/ s - (3RcQjG, aDGOs ((3GdbGgQI (B:s (3eDSSI QhR GdjhSa,s, 1977)
Keywords: (3JGQjN eUQs; (3GdJGQjN GdSjGSjs