| 其他書名 | Letter from the Secretary of the Interior Transmitting Report on the Development of the Unused Lands of the Country ... |
| 出版 | U.S. Government Printing Office, 1919 |
| URL | http://books.google.com.hk/books?id=EUVIAAAAYAAJ&hl=&source=gbs_api |
| EBook | FULL_PUBLIC_DOMAIN |