| 其他書名 | Services of Lines of Ocean Vessels Through the Panama Canal and to Its Terminal Ports : Passenger Connections from the Panama Canal : Air Services to and from the Canal Zone |
| 出版 | Panama Canal Press, 1930 |
| URL | http://books.google.com.hk/books?id=eEy9PAAACAAJ&hl=&source=gbs_api |