zbad Advanced Placement Source
zebo Britannica Academic (formally Encyclopædia Britannica Online)
zbds:pubk12 EBSCO Discovery Service (High School)
zbds EBSCO Discovery Service (Other Profiles)
zber ERIC (at EBSCOhost)
zbet Ethnic Diversity Source
zbxh Explora for High School
zbth International Bibliography of Theater & Dance with Full Text (IBTD)
zbs2 MasterFILE Complete
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zbpd Professional Development Collection (education)
zbpb Psychology & Behavioral Sciences Collection
zbsc Sociological Collection