Institution
- Philadelphia Inter-State Dairy Council, Philadelphia, Pennsylvania1
- Piggly Wiggly Bird Co.1
- Pillsbury Flour Mills Co.1
- Pillsbury Food Products, Minneapolis, Minnesota1
- Pillsbury Home Service Center1
- Pillsbury Mills, Inc.1
- Plant Flour Mills Co., St. Louis, Missouri1
- Planters1
- Plymouth Rock, New York 1
- Portable Kitchens Division of Hamlin Products, Inc.1
- Poultry & Egg National Board1
- Prince Golden1
- Private Collection 0021
- Private Collector 0211
- Private collection1
- Private collection 0081
- Proctor & Gamble1
- Proctor & Gamble Bakery Service1
- Producers Creamery Company1
- Quaker Oats1