http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Là một trong 03 tập thuộc bộ sách Grammar Spectrum. Grammar pectrum 1 là tập dành cho người học ở trình độ sơ cấp. Giải thích và thực hành những điểm ngữ pháp ở trình độ sơ cấp. Sách gồm 44 bài học, sinh viên có thể sử dụng để tự học ở nhà hoạc ở trên lớp.