http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Vocabulary reference and practice with answers
Textbooks for foreign speakers ; English language
Problems, exercises, etc ; Ngôn ngữ Anh
Sách hướng dẫn dành cho người nói tiếng nước ngài ; Tiếng Anh