Generally refers to journals, focus, papers and so on.
The code of the paper is J.
Attached:
According to the provisions of GB3469-83 "Document Type and Document Carrier Code", identified by a single letter:
M——Monograph (including ancient books) (historical and chronicle works)
C——Proceedings
N——Newspaper article
J——Journal article
D——Dissertation
R——Research report
S——Standard
P——Patent
A——Monograph , Extracted documents in the collection of papers
Z——Other unspecified document types
Electronic document types are identified by double letters:
DB——Database< /p>
CP - Computer Program
EB - Electronic Bulletin
For electronic documents on non-paper-based carriers, the type of carrier should also be indicated in the reference mark:
p>
DB/OL——Online database
DB/MT——Tape database
M/CD——Compact disc book
CP /DK——Disk Software
J/OL——Online Journal
EB/OL——Online Electronic Bulletin.