1.
図書 |
Fred H. Sanderson
|
|||||||
2.
図書 |
von Winfried von Urff
|
|||||||
3.
図書 |
Ray A. Goldberg
|
|||||||
4.
図書 |
Edward Laurence
|
|||||||
5.
図書 |
by Mack M. Jones
|
|||||||
6.
図書 |
by Mack M. Jones
|
|||||||
7.
図書 |
prepared by specialists in the United States Department of Agriculture ; under the editorial supervision of Gustav E. Larson
|
|||||||
8.
図書 |
prepared by members of the Division of Farm Management and Costs, Bureau of Agricultural Economics, U.S.D.A.
|