 | Vertical integration United States. | (2) |
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 | Contract production and vertical integration in farming, 1960 and 1970 / . Mighell, Ronald L. (Ronald Lester), 1902- 4n Washington, D.C. : U.S. Dept. of Agriculture, Economic Research Service, 1972. | |
| Vertical coordination via contract farming / Marshall Harris and Dean T. Massey. Harris, Marshall Dees, 1903- 2n Washington, D.C. : Natural Resource Economics Division, Economics Research Service, U.S. Dept. of Agriculture, 1968. | |
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