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19th century

These databases provide primary documents produced in the 1800s.

Primary, secondary, and tertiary sources

Primary sources allow researchers to get as close as possible to original ideas, events, and empirical research as possible. Such sources include creative works, first hand accounts of events, and the publication of empirical observations or research.

Secondary sources analyze, review, or summarize information in primary resources or other secondary resources. Secondary sources often rely on other secondary sources and standard disciplinary methods to reach results, and they provide the principle sources of analysis about primary sources.

Tertiary sources provide overviews of topics by synthesizing information gathered from other resources. Tertiary resources often provide data in a convenient form or provide information with context by which to interpret it.

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