Scopus_ASJCIt consists of 334 ASJC 4-digit integer codes (column ASJC)
together with their group identifiers (column ASJC_Parent)
and descriptions (column Description).
ASJC codes are used to classify Scopus sources (see Scopus_SourceList).
Scopus_SourceList, Scopus_ReadCSV, Scopus_ImportSources