| 其他書名 | At the 1933 Convention of the Association of Governmental Officials in Industry of the United States and Canada. Chicago, Ill |
| 出版 | U.S. Government Printing Office, 1934 |
| URL | http://books.google.com.hk/books?id=fgVljqPykesC&hl=&source=gbs_api |
| EBook | FULL_PUBLIC_DOMAIN |