HISTORIC WATERWAYS - A ROUTE FOR INTERNATIONAL COOPERATION (-CIVILIZATION AND THE GREAT HISTORICAL RIVERS-)
В.А. Широкова, Э.А. Лихачева · SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 20th International Multidisciplinary Scientific GeoConference Proceedings SGEM 2020, Ecology, Economics, Education and Legislation
