Books, periodicals and conference documents are three common literature resources. They have different characteristics and uses, but they also have some connections and overlaps.

The main difference between them lies in the content, form and publishing cycle. Books are long works with detailed contents and a long publishing cycle, usually from several months to several years. A periodical refers to a periodical publication with a wide range of contents and a short updating period, generally weekly, bimonthly or monthly. Conference documents are articles and reports published in academic conferences, which are temporary publications, and the update cycle is very short, usually from a few days to several weeks.

Although there are obvious differences between them, there are also some connections and overlaps between them. For example, the ideas and theories in books are often cited by journals or conference documents to support their own research, while books often include research and academic achievements in journals and conference documents.

To sum up, books, periodicals and conference documents have different characteristics and uses, but they also have complementary relationships, and the isomorphism of * * * has become a rich and colorful literature resource.