| 其他書名 | Hearings Before the Committee on Labor and Public Welfare, United States Senate, Eighty-first Congress, First Session on S. 249 ... |
| 出版 | U.S. Government Printing Office, 1949 |
| URL | http://books.google.com.hk/books?id=ICwS3NfLJG8C&hl=&source=gbs_api |
| EBook | FULL_PUBLIC_DOMAIN |