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- Resources that already have persistent links. These include:
- Previously assigned PURLS. Generally, these will be US government documents with GPO PURLS.
- Links using the Handle System. These start with "hdl.handle.net".
- DOI links. These start with "dx.doi.org".
- Resources loaded from Serials Solutions and Ebsco. These The Serial Solutions records have a 948 $hSerialSolutions in the Voyager record. ; the Ebso records have a 948 $h All edits get overwritten in the subsequent record load.
- Resources not directly or indirectly maintained by Cornell.