PRAGUE — Dozens of country are likely to agree soon on international rules for returning property stolen by the Nazis, a U.S. official said Wednesday. More than 30 countries will hold talks Thursday in Prague on draft guidelines regarding restitution, said Stuart Eizenstat, a special adviser to the U.S. Secretary of State on Holocaust issues. If agreed to, they would be the first international rules ever, Eizenstat said. He said he hoped the rules, which would not be legally binding, could be announced in early June.