| 其他書名 | A Report of Findings by the Working Group Appointed by the Secretary of Agriculture, U.S. Dept. of Agriculture, Jan. 1959 |
| 出版 | U.S. Government Printing Office, 1959 |
| URL | http://books.google.com.hk/books?id=G2NCAAAAYAAJ&hl=&source=gbs_api |
| EBook | FULL_PUBLIC_DOMAIN |