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The Concept Map you are trying to access has information related to:
LanguageStandardsRelationships, ANSI/NISO Z39.53 Codes for the Representation of Languages for Information Interchange consistent with 639-2/B Bibliographic Codes, ISO 639-2 Alpha-3 Code consists of 639-2/T Terminology Codes, ISO 639 consists of ISO 639-2 Alpha-3 Code, ISO 639-1 Alpha-2 Code is proper subset of 639-2/T Terminology Codes, ANSI/NISO Z39.53 Codes for the Representation of Languages for Information Interchange based on (English only) MARC 21 Code List for Languages, ISO 639 consists of ISO 639-1 Alpha-2 Code, 639-2/B Bibliographic Codes based on MARC 21 Code List for Languages, ISO 639-2 Alpha-3 Code consists of 639-2/B Bibliographic Codes