- Burnham & Morrill Co.1
- CAAHO/Dreamkeepers42
- Calavo Growers of California1
- California Associated Raisin Co., Fresno, California1
- California Fruit Grower Exchange1
- California Fruit Growers Exchange1
- California Fruit Growers Exchange, Bert L. White Company, Los Angeles, California1
- California Fruit Growers Exchange, Los Angeles, California
1
- California Prune and Apricot Growers Assn., San Jose, Cal. 1
- Caloric1
- Calumet Baking Powder Co, General Foods.1
- Calumet Baking Powder Co., Chicago, Illinois4
- Calumet Baking Powder Company2
- Camden Archives and Museum225
- Campbell's1
- Canned Salmon Industry1
- Carl Sandburg Home National Historic Site14
- Carnation Company1
- Carnation Milk3
- Catholic Diocese of Charleston Archives137