※一部利用できない機能があります
1.
図書 |
prepared by members of the Division of Farm Management and Costs, Bureau of Agricultural Economics, U.S.D.A.
|
|||||||
2.
図書 |
by S. Howard Patterson, A.W. Selwyn Little, Henry Reed Burch
|
|||||||
3.
図書 |
by Joseph B. MacLean
|