http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Giới thiệu đại cương về logic học, những quy luật cơ bản của tư duy, khái niệm, phán đoán, suy luận, chứng minh và bác bỏ.