- Yolo Basin Foundation Records (D-611)
- Yolo County, Justice Court, Putah Township, Records Collection. (D-194)
- Yolo Winery Association Collection. (MC128)
- York, John P. Slide Collection. (D-456)
- Young, Peter. Lantern Slides of Latin America. (D-558)
- Yuba County Board of Supervisors Collection (D-410)
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