| 其他書名 | Hearing Before the Subcommittee on Science and Space of the Committee on Commerce, Science, and Transportation, United States Senate, One Hundred Twelfth Congress, Second Session, June 20, 2012 |
| 出版 | U.S. Government Printing Office, 2014 |
| URL | http://books.google.com.hk/books?id=PavHYh-IqIoC&hl=&source=gbs_api |
| EBook | FULL_PUBLIC_DOMAIN |