| 其他書名 | A Work Study in Social Gerontology; a Demonstration Project at the University of Denver |
| 出版 | U.S. Department of Health, Education, and Welfare, Administration on Aging, 1973 |
| URL | http://books.google.com.hk/books?id=fi3g27M4CmMC&hl=&source=gbs_api |
| EBook | FULL_PUBLIC_DOMAIN |