J.B. · J.B. B. Penn · J.B. L. Penn · J. P.
| title | media type | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|---|
| Agricultural and Food Policy | Paperback | 978-0-13-171873-9 (0-13-171873-8) | 2006 | Ronald D. Knutson · Barry L. Flinchbaugh |
| Agricultural and Food Policy | Hardcover | 978-0-13-019860-0 (0-13-019860-9) | 1995 | Ronald D. Knutson · William T. Boehm |
| Agricultural and Food Policy, Fifth Edition | Paperback | 978-0-13-064845-7 (0-13-064845-0) | 2003 | Ronald D. Knutson · Barry L. Flinchbaugh |