 | Wheat United States Geographical distribution Statistics. | (2) |
 |
 | Distribution of the varieties and classes of wheat in the United States in 1969 / . Reitz, Louis Powers, 1907- 1n Washington, D.C. : Agricultural Research Service, U.S. Dept. of Agriculture, 1972. | |
 | Distribution of the varieties and classes of wheat in the United States in 1964 / . Reitz, Louis Powers, 1907- 1n Washington, D.C. : Agricultural Research Service, U.S. Dept. of Agriculture, 1966. | |
|