http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Bài tập hóa học ở trường phổ thông
Bài tập hoá học là phương tiện cơ bản nhất để dạy học sinh tập vận dụng kiến thức vào thực hành. Sự vận dụng các kiến thức thông qua các bài tập có nhiều hình thức rất phong phú và đa dạng.