Here are some e-resources for pop culture/history (historical highlights, inventions, fads, fashion, sports, movies, tv, music, etc.) Might be helpful for a decades project. These links focus on American people and events, but will often have some relevance to a Canadian context.
(Thanks Annette Farmer via LM-NET)
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For more Canadian content, check out the following:
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Archer Audio Archives
American Cultural History: 20th Century
20th Century: Media History Project: U of M