| ID | 252502 |
| Call Number | X9J:85.7375/H2/046873 |
| Title Proper | Twenty - One Years of Iowa Farm Records |
| Language | ENG |
| Author | Hopkins J. A. |
| Publication | Agriculture Experinment Station Iowa State College of Agriculture, 1942. |
| Series | Research Bulletin 309 |
| Classification Number | X9J:85.7375 |