Tertiary Sources

 This is the most problematic category of all.

Some Definitions of Tertiary Sources:

1.   Works which list primary and secondary resources in a specific subject area

2.   Materials in which the information from secondary sources has been "digested" - reformatted and condensed, to put it into a convenient, easy-to-read form.

3.   Sources which are once removed in time from secondary sources

Some examples of tertiary sources:

1.   Almanacs and fact books

2.   Bibliographies (may also be secondary)

3.   Chronologies

4.   Dictionaries and encyclopedias (may also be secondary)

5.   Directories

6.   Guidebooks, manuals etc

7.   Handbooks and data compilations (may also be secondary)

8.   Indexing and abstracting tools used to locate primary & secondary sources      (may        also be secondary)

9.   Textbooks (may also be secondary)

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