
Themes
Encyclopedia entries have been gathered into Themes, like with like, to guide readers to their interests (or school assignments). Most entries belong to two or more Themes, a reflection of history's refusal to be single-minded.
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Agriculture and Ranching — 178
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Archaeology and Anthropology — 42
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Architecture and Historic Preservation — 210
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Arts — 265
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Black History — 80
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Education — 275
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Environment and Natural Resources — 457
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Exploration and Explorers — 61
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Folklife — 13
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Geography and Places — 388
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Geology — 32
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Government, Law, and Politics — 733
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Labor — 59
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LGBTQ — 23
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Literature — 149
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Native Americans — 216
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Oregon Trail and Resettlement — 135
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Oregoniana—you know it when you see it. — 77
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Race, Ethnicity, and Nationality — 372
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Religion — 130
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Science, Medicine, and Technology — 201
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Sports and Recreation — 193
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Trade, Business, Industry, and the Economy — 453
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Transportation and Communication — 293
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Women — 247