#directory  an alphabetical list of names and addresses
  supertype:  #reference_book__referencebook__reference__reference_work__referencework__book_of_facts  a book to which you can refer for authoritative facts; "he contributed articles to the basic reference work on that topic"
  subtype:  #phonebook__telephonebook__telephone_directory__telephonedirectory  a directory containing an alphabetical list of telephone subscribers and their telephone numbers
     subtype:  #Yellow_Pages__yellow_pages  a telephone directory or section of a directory (usually printed on yellow paper) where business products and services are listed alphabetically by field along with classified advertising
  subtype:  #blue_book.directory__bluebook  a register of persons who are socially prominent

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