In humanities disciplines, a primary source:

• Is anything produced by humans during the time period under consideration:
  • Texts, whether published (books, articles, patents, transcripts) or unpublished (diaries, notes, manuscripts);
  • Imaginative work, such as paintings, music, movies, or novels;
  • Visual resources, such as photographs or newsreels;
  • Sound recordings, such as interviews;
  • Material culture, such as scientific instruments, clothing, or garbage dumps.

• Peer Reviewed
• Published in a scholarly journal
• Contain first-hand reports of research presented by the person or team that did the research.
• Cited to reference the results and discussion of their research.

Because primary sources in the humanities can take myriad forms, you likely will need to use different search tools, including Google, for identifying relevant primary source materials.  That said, you can use Primo to locate most textual resources, along with images and multimedia.