| 其他書名 | Fifty-seventh Annual Report of the Ohio Agricultural Experiment Station, Wooster, Ohio, for the Year Ending June 30, 1938. 1938-1939 |
| 出版 | Ohio Agricultural Experiment Station, 1938 |
| URL | http://books.google.com.hk/books?id=Vf9JAQAAMAAJ&hl=&source=gbs_api |