The Online Archive of California (OAC) provides free public access to detailed descriptions of primary resource collections maintained by more than 200 contributing institutions including libraries, special collections, archives, historical societies, and museums throughout California and collections maintained by the 10 University of California (UC) campuses.

Calisphere provides free access to unique and historically important artifacts for research, teaching, and curious exploration. Discover over 750,000 photographs, documents, letters, artwork, diaries, oral histories, films, advertisements, musical recordings, and more.

The collections on Calisphere have been digitized and contributed by all ten campuses of the University of California and other important libraries, archives, and museums throughout the state.

The Azusa City Library has created a digital copy of our one-of-a-kind collection of local newspapers.

Provides a variety of local history resources including historical newspapers, yearbooks from local schools, The Glendoran Magazine (in print and digital form) and some files with clipping on a variety of topics.

Has a full run of San Gabriel Valley Tribune newspapers on microfilm.

Special Collections of Azusa Pacific University are housed in the Thomas F. Andrews Room of the Hugh and Hazel Darling Library, located on APU's West Campus. Access to the items in Special Collections is provided through the Library Catalog, and through finding aids.

Some collections from the Huntington are online. In person research is restricted to scholars and requires an application process.

Erected in 1911, the Firehouse is located directly behind Covina City Hall at 125 East College Street.
The jail serves as a safe repository for thousands of documents and photographs; dozens of photos taken by CW Tucker document the growth in the area, scrapbooks, early invoices, legal documents and citrus records offer a glimpse of cultural and social life of the area.

The Glendora Historical Society was founded in 1947 to help preserve the history of Glendora and the Upper San Gabriel Valley. The Society maintains items and research collections at the Glendora Museum located in downtown Glendora and collections at the Rubel Castle Historic District in the foothills of Glendora.

Mission is to preserve the history of San Dimas and bringing together those who are interested in Southern California regional history and sharing historical materials to educate.