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Publisher
- University of Iowa96
- Huebinger Survey and Map Publishing Co.35
- Thompson and Everts21
- United States. Commodity Stabilization Service3
- Sanborn (Firm)2
- United States. Agricultural Stabilization and Conservation Service2
- Associated Billposters & Distributors Pro. Co.1
- Bryan & Millar1
- Economy Advertising Company1
- Huebinger Surveying and Map Publishgin Company1
- Iowa City Branch of the American Association of University Women1
- Iowa Pub. Co.1
- Iowa State University Library (Ames)1
- Iowa. State Planning Board1
- J. J. Novak1
- Koser Bros.1
- The Office1
- U.S. Geological Survey1
- United States. Department of Agriculture1
- United States. Department of Agriculture. Production and Marketing Administration1