—01 Philosophy and theory
—025 Directories of persons and organizations
—03 Dictionaries, encyclopedias, concordances
[—04 Special topics]
—05 Serial publications
—06 Organizations and management
—07 Education, research, related topics
—072 Research; statistical methods
—09 Historical, geographic, persons treatment
—092 Persons
—0922 Collected persons treatment
—093-099 Treatment by specific continents, countries, localities; extraterrestrial worlds