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ISSN (識別子)
JFM (識別子)
JSTOR (識別子)
LCCN (識別子)
LCCN (identifier)LIR (識別子)
LIR (identifier)Marina Militare (識別子)
Marina Militare (identifier)MarineTraffic (識別子)
MarineTraffic (identifier)MATHSN (識別子)
MBA (識別子)
MedRxiv (識別子)
MGP (識別子)
MR (識別子)
NAID (識別子)
NARA (識別子)
NARA (identifier)NCID (識別子)
NCL (識別子)
NDL (識別子)
NGA (識別子)
NGA (identifier)NGV (識別子)
NKC (識別子)
NKC (identifier)NLA (識別子)
NLA (identifier)NLI (識別子)
NLK (識別子)
NLK (identifier)NLP (識別子)
NLR (識別子)
OCLC (識別子)
OL (識別子)
ORCID (識別子)