Many types of source works require a "Descriptor" to further identify the work in order to facilitate the relocation of the work by readers.

In some instances, these types of works do not have a unique title, and must therefore be described as a "map", "letter", "review", "interview," "chart", "editorial" and so on.

In other instances, the work does have a unique title, but needs to be described for the reader as a work other than the typical article or book - as a "technical report", "monograph", "symposium", "leaflet", "reprint", "working paper", etc.

Examples
      Editorial, titled
      Symposium, titled
      Letter to the editor, untitled
      Book review, signed, titled
      Book review, signed, untitled
      Monograph, bound into a journal
      Introduction to a book
      Preface to a book
      Photographic reprint
      Multilingual article, descriptor indicating original language
      ALR annotation
      Student authored comment
      Advisory committee notes

Editorial, titled, unsigned
When a source is unsigned, leave the author field blank.


Symposium, titled, unsigned


Letter to the editor,
signed, untitled


Book review
signed, titled


Book review
signed, untitled


Monograph, bound into a journal
In most instances, it is not necessary to indicate that a source work is a monograph, since monographs are simply books focussed on a very specific topic. If, however, the monograph has been bound into a journal, use the Article in a Journal (extended) form, and indicate that the work is a monograph in the Descriptor field.