| 其他書名 | Hearing Before the Select Committee of Inquiry Into Operations of the United States Air Services, House of Representatives, Sixty-eighth Congress, on Matters Relating to the Operations of the United States Air Services... |
| 出版 | U.S. Government Printing Office, 1925 |
| URL | http://books.google.com.hk/books?id=-3hEzS0tzv8C&hl=&source=gbs_api |