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Follow the evidence

Research & Sources

Collections, local records, and a practical approach to asking better questions about Pomona.

Your starting point

One question. A trail of evidence.

Choose a place or person. Find a record. Note what it establishes—and what it leaves unanswered.

Good local history makes its evidence easy to follow. Begin with a narrow question, preserve the details of what you find, and distinguish an observation from an explanation.

Useful starting points

Pomona Public Library

The Digital Collections include local photographs, portraits, homes, landmarks, citrus imagery, and other materials. Read each item’s description and use conditions. Online access alone does not establish permission to republish an image.

Cal Poly Pomona

The Pomona Valley Historical Collection introduces regional archival material. Its collection descriptions help identify promising records before a research visit.

City and preservation records

Use the City’s historic preservation pages and historic properties list when researching designations and individual places.

Historical Society of Pomona Valley

The Historical Society publishes histories of properties in its care. Verify dates and interpretations against additional records when a detail is central to your argument.

Community histories

Densho’s Pomona detention facility article provides a documented entry point into Japanese American incarceration at the fairgrounds. Seek community-authored resources and individual testimony alongside institutional records.

A useful research note

  • Write the question and the exact place or person you are investigating.
  • Record the author, collection, title, date, item number, and stable source link.
  • Note whether a date is exact, estimated, or supplied by a later cataloger.
  • Keep your transcription separate from your interpretation.
  • Record unresolved contradictions instead of silently choosing the most convenient account.

Images and corrections

The bundled demo pictures are generated illustrations, not archival evidence. For a published historical image, keep its attribution, permission information, and descriptive context together at the point of use. When a factual correction changes an article’s meaning, explain the change within that article.

Try a street-history research project

There is more to discover

Keep exploring Pomona

Places to explore

Historic Places

Follow familiar streets and landmark buildings into the stories around them.

A closer look

Then & Now

Compare views, notice what changed, and ask what the evidence can tell us.

The journal

Stories from our city

People, places, and everyday moments that open a window into Pomona’s past.