This collection is comprised of various citrus associations papers. Most of the associations are geographically concentrated around Southern California, although some of them are from other areas.

This collection is composed of one hundred thirty-one (131) books and pamphlets related to the Citrus Industry in California and Arizona.

The Citrus Collection Subject Files contain a variety of materials realted to the Citrus Industry. These materials include reports and production estimates, citrus growing, marketing and citrus disease, and information about prominent individuals within the citrus industry.

The Local History Collection focuses on the history of Orange County California and the cities within Orange County, Southern California and to a lesser extent California as a whole.

The collection includes 3860 cataloged books and pamphlets, correspondence, ephemera, manuscripts, maps, memoribilia, microfilm, papers, periodicals, posters and photographs.