Any authors, series title and subjects that are unauthorized should be checked in OCLC Connexion.
In OCLC Connexion, to search for an authority you can either use SHIFT-F2 or by clicking on 
.
Where you search for an authority record, you will the image like this below: 
Here are the equilvalent MARC codes and the equilavalent Authority Names:
MARC |
Authority Names |
|---|---|
240, 440, 490 |
Titles |
110, 651, 710 |
Corporate Names |
100, 700 |
Personal Names |
650 |
Subjects |