| 其他書名 | Hearings 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=PtA3TbSpn4gC&hl=&source=gbs_api |