This collection contains the Adobe Squares square dance club of Petaluma, California, records, photos and event materials covering the entire span of the club's history.

This collection contains organizational and promotional records from the Circles 'n Squares square dance club of Santa Rosa, California.

This collection contains the business records of Pedersen's Furniture Company, which was known as Santa Rosa's oldest family-owned store until its closure in 2019. The collection includes family photographs, advertisements, ledgers and ephemera documenting the history of the company. It was founded in 1892 by Jens Christian Pedersen, a Danish immigrant and cabinet maker. The collection also includes photos of the 1906 earthquake and several issues of the Santa Rosa High School Newsletter.

This collection contains newspaper clippings, photographs, brochures, and other marketing materials about the City of Petaluma. Includes video and other material on the 1979 Analy High School video class production on the Petaluma-Santa Rosa Railroad, Our train down Main.

This collection contains 24 binders and 1 bag that include programs, photographs, advertisements, administrative records of the Santa Rosa Community Concert Association of Santa Rosa, California.

Collection contains images, postcards, maps, wine bottle labels and other emphemera that portray the wine makers and companies of Sonoma County, past and present, from the 1860s through the 2000s. They document the immigrants and Utopians who founded the early wineries, wine families, the vineyards and wine production and the many varieties of wine created in Sonoma County.

The collection contains personal papers and research materials accumulated by author and wine historian William F. Heintz. Includes business records, correspondence, newspaper clippings, personal records, transcripts of audio recordings, photographic material, video recordings, winery history manuscripts, notes and memorabilia.The materials focus on the history of wine and wineries in Sonoma and Napa Counties California, particularly in the areas of Alexander Valley and Sonoma Valley.