| 其他書名 | A History of Pennsylvania's Annual Agricultural Exposition |
| 出版 | Pennsylvania Historical and Museum Commission, 1991 |
| 主題 | History / United States / State & Local / Middle Atlantic (DC, DE, MD, NJ, NY, PA)Technology & Engineering / Agriculture / General |
| ISBN | 08927104899780892710485 |
| URL | http://books.google.com.hk/books?id=sKINXFFNAHEC&hl=&source=gbs_api |