| 1.
雑誌 |
雑誌
|
Agriculture and Home Economics Experiment Station, Iowa State University of Science and Technology
|
||
| 2.
雑誌 |
雑誌
|
Agricultural Experiment Station, Iowa State College of Agriculture and Mechanic Arts
|
||
| 3.
雑誌 |
雑誌
|
Agricultural Expriment Station, Iowa State College of Agriculture and Mechanic Arts
|
