A multivolume set exploring each decade of American Life from the beginning of the 20th Century.
Also available online through the database Gale Virtual Reference Online! Click here!
The companion set is American Decades: Primary Sources .
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Professors may have told you not to use "encyclopedias" in your research. They were probably referring to general encyclopedias (like Britannica), not the specialized, topical encyclopedias that may be highly valuable as you explore your topic.
Specialized encylopedias are written by experts in the field and will provide you with both overviews of and context for your topic while suggesting narrower topics to explore as well. Use the references and bibliographies included therein to find more sources on aspects that interest you.
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