 | Grain Transportation. | (2) |
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 | Owning or leasing of covered hopper cars by farmer cooperatives / by Thomas H. Camp and David Volkin. Camp, Thomas H. (Thomas Harley), 1929- 4n Washington, D.C. : Farmer Cooperative Service, U.S. Dept. of Agriculture, 1967. | |
| Heavy grain exports in voyage-chartered ships : rates and volume / . Hutchinson, T. Q. (Thurlow Quinton), 1935- 1n Washington, D.C. : U.S. Dept. of Agriculture, Economic Research Service, 1968. | |
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