http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Giới thiệu tổng quan về hệ thống viễn thông, hệ thống thông tin viba, hệ thống thông tin vệ tinh, hệ thống thông tin sợi quang, hệ thống thông tin di động