| 其他書名 | Proceedings of a Conference Held at the Washington Hilton Hotel and Towers, Washington, D.C., November 27-28, 1990 |
| 出版 | National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Division, 1991 |
| URL | http://books.google.com.hk/books?id=uAsnYxik3w4C&hl=&source=gbs_api |
| EBook | FULL_PUBLIC_DOMAIN |