Research on energy security in Central and Eastern European countries 并列题名：Research on energy security in Central and Eastern European countries Research on economic and trade topicsin Central and Eastern European countries Transportation report in central and Eastern European countries Reports on the cultural development of central and eastern european countries Annual report on the development of central and eastern European countries 并列题名：Reports on the cultural development of central and eastern european countries Annual report on the development of central and Eastern European countries Reports on the cultural development of Central and Eastern European countries Annual report on the development of Central and Eastern European countries