 | Agricultural prices United States. | (2) |
 |
 | Analysis of price trends for principal agricultural commodities / by J.C. Purcell and J.C. Elrod. Purcell, Joseph C. cn : University of Georgia, College of Agriculture Experiment Stations, 1973. | |
| Seasonal price patterns of selected agricultural commodities / by Allan P. Rahn. Rahn, Allan P. Ames, Iowa : Iowa State University of Science and Technology, Cooperative Extension Service, 1968. | |
|