| 其他書名 | Projected Contributions and Benefits Under Three Proposals (S. 1792 and S. 2313/H.R. 4256 in the 105th Congress, and a Plan by Robert M. Ball) |
| 出版 | Congressional Research Service, Library of Congress, 1998 |
| URL | http://books.google.com.hk/books?id=pesCtwAACAAJ&hl=&source=gbs_api |