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Primary sources are also sets of data, such as health statistics, which have been tabulated, but not interpreted. 1  Journals or Periodicals: main type of publication in which scientific research is reported. 2  May be published by learned societies or by commercial publishers. 3  A researcher(s) submits an article to a journal.
Primary sources and secondary sources. Primary sources are first hand sources. For instance, an inscription on a wall, a painting, interviews, diaries and the like. Whereas, a secondary source is when you obtain information from someone or something else. For instance, a newspaper or a magazine.