| 其他書名 | Prepared for the Committee on Agriculture of the House of Representatives, Eighty-first Congress, Second Session. Dec. 21, 1950 |
| 出版 | U.S. Government Printing Office, 1951 |
| URL | http://books.google.com.hk/books?id=qAW4AAAAIAAJ&hl=&source=gbs_api |
| EBook | FULL_PUBLIC_DOMAIN |