| 其他書名 | Hearings Before the United States House Committee on Interstate and Foreign Commerce, Subcommittee on the Panama Canal, Seventy-First Congress, Second Session, on Mar. 3, 6, 1930 |
| 出版 | U.S. Government Printing Office, 1930 |
| URL | http://books.google.com.hk/books?id=P2gZzQEACAAJ&hl=&source=gbs_api |