| 其他書名 | Hearings Before the Subcommittee on Advanced Research and Technology of the Committee on Science and Astronautics, House of Representatives, Ninetieth Congress, Second Session. September 24, 25, 26, 30; October 1, 2, and 3, 1968 |
| 出版 | U.S. Government Printing Office, 1969 |
| URL | http://books.google.com.hk/books?id=D0w2AQAAIAAJ&hl=&source=gbs_api |
| EBook | FULL_PUBLIC_DOMAIN |