| 其他書名 | Data on natality, marriage, and divorce. Series 21 |
| 出版 | U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control, National Center for Health Statistics, 1989 |
| ISBN | 08406050729780840605078 |
| URL | http://books.google.com.hk/books?id=kUK-WqzzWcMC&hl=&source=gbs_api |