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What do you mean by referring to m and j?
Reference M refers to monographs and J refers to periodical literature.

The reference description rule is GB/T 77 14-2005, which is applicable to references catalogued by authors and editors, but not for librarians, cataloguers and index editors.

Extended data:

National standards for reference:

This standard specifies the description formats of monographs, serial publications, patent documents, documents separated from monographs and documents separated from serial publications respectively. Among the five description formats, the description items marked "for selection" are all the choices of references, and the rest are the main items of references. According to the first paragraph of this standard

The provisions of the sixth chapter or choose projects according to the characteristics of the literature itself.

The source of reference is the reference itself. Monographs and serial publications can be recorded in turn by title page, cover and masthead. Non-book materials such as micro-copying and audio recording can be recorded according to the title box, title, label and attachment on the container.

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