| 其他書名 | Radiophysical Investigations of Venus |
| 出版 | National Aeronautics and Space Administration, for sale by the Clearinghouse for Federal Scientific and Technical Information, Springfield, Va., 1969 |
| URL | http://books.google.com.hk/books?id=_o-4BokN_soC&hl=&source=gbs_api |
| EBook | FULL_PUBLIC_DOMAIN |