| 其他書名 | A Survey of Systems Covering Employees Also Covered by the Federal Old-age, Survivors, Disability, and Health Insurance Program |
| 出版 | U.S. Department of Health, Education, and Welfare, Social Security Administration, Office of Research and Statistics, 1966 |
| URL | http://books.google.com.hk/books?id=_5pqZKK1DjQC&hl=&source=gbs_api |