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The Hulbert Taft, Jr. Library

AP U.S. History: 1877-1941: Reference Sources


These sources provide essential background information - facts like who, what, when, where, why, and how - that will be useful as you dive deeper into your research.


  • This will allow you to better understand where the specific information you find later fits in the bigger picture.
  • Make note of terms, also called keywords, relevant to your topic:
    • Examples: names of people; important dates; relevant legislation; words or expressions unique to your topic.
  • You can use these keywords when searching for secondary sources (books and journal articles) and primary sources. 
  • Reference sources often contain bibliographies that lead you to secondary and primary sources.

Examples of Reference Sources: Encyclopedias, dictionaries, almanacs, atlases, thesauruses, and indexes.


Tips for Citing Reference Sources in NoodleTools

Online Subscription Databases

Subject-Specific Reference Materials


Click on the links below for reference materials in these subject areas:
Resource Allows NoodleTools Export Citations can be exported from this source to NoodleTools.
Contains Primary Sources This source contains Primary Sources.


General U. S. History Reference Sources

If you have any questions, see
Mr. Padgett, Ms. Taylor, or Mr. Previti
OR email us at
We're here to help!