http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Tuyển tập các tiêu chuẩn quốc gia (TCVN) về vật liệu điện, cách điện và bộ phận của thiết bị điện - Tập 2
Tổng cục Tiêu chuẩn-đo lường-chất lượng
Tiêu chuẩn quốc gia--Vật liệu điện--Cách điện--Thiết bị điện