ISSN of Series

MARC-Bib: 490x (International Standard Serial Number)

Check the 'Source' instruction to be sure that you are looking at the correct source(s) of information on the resource
If data on the resource and data as the element in the record are:
- PoR/PaE–check the Data Entry instructions:
  - data for this element must be Transcribed: make sure the data matches word-for-word and letter-for-letter, e.g., fix common exceptions
- PoR/AaE–check the Core instructions:
  - data for this element is LCPCCCore:
    - if the data has been given as a wrong element, move it to the correct element
    - if you are following LC-PCC policy, add the data for this element
    - if you are not following LC-PCC policy, add the data if you feel it might be useful–remember the principles of differentiation and sufficiency
- AoR/PaE–check the Source instructions again:
  - since the Source for this element is or includes '[OSoI]', accept the data if it is 'supplied' (e.g., in square brackets, or explained in a note), as long as it seems applicable; indicate that the data is 'supplied' (with square brackets or a note 2.2.4), if that has not been done
- AoR/AaE–go to the next element:
  - but be sure to check the resource carefully, if the data for the element is Core, or if the data is important for differentiating the resource from a similar resource
Check below, for any useful Notes