| 其他書名 | Hearing Before the Committee on Education and Labor, House of Representatives, One Hundredth Congress, First Session, Hearing Held in Davenport, IA, October 9, 1987 |
| 出版 | U.S. Government Printing Office, 1988 |
| URL | http://books.google.com.hk/books?id=T7Ao7TP18EAC&hl=&source=gbs_api |