http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Các nội dung trong sách được trình bày theo trình tự: làm thí nghiệm, quan sát, kết luận về tính chất các chất và các quy luật chi phối các hiện tượng hóa học.