The copyright page is the record page of the copyright mark and version of the publication, which is usually located on the back, back cover or end of the title page of the book. The copyright page shall record the title, author, publisher, printer, publisher, edition number, serial number, format, loose leaf, serial number, number of words, year of publication, copyright period, book number, pricing and other related explanatory matters as required. Its important contents should be mainly written to explain and protect copyright, such as "copyright, no reprinting", "copyright, no reprinting" and "no reprinting". Copyright page is not only a window for readers to know about book publishing, but also one of the important information sources for literature description.
The function of retrieval certificate is actually the same as that of retrieval page printing page, which is the most direct proof of successful publication and retrieval of papers. The reason why the retrieval certificate is more complicated is that the retrieval certificate needs to be issued by a professional institution, and it is impossible for the author himself to issue it. Generally, the institution that can issue search certificates is the university library.