| 其他書名 | Hearings Before the Subcommittee on Science of the Committee on Science, Space, and Technology, U.S. House of Representatives, One Hundred Second Congress, First Session, February 20; March 12, 13, 1991 |
| 出版 | U.S. Government Printing Office, 1991 |
| URL | http://books.google.com.hk/books?id=KWxbmptlk1cC&hl=&source=gbs_api |
| EBook | FULL_PUBLIC_DOMAIN |