| 其他書名 | Perspectives and Principles [by Richard A. Myren [and] Lynn D. Swanson |
| 出版 | U. S. Department of Health, Education, and Welfare, Social Security Administration, Children's Bureau, 1962 |
| URL | http://books.google.com.hk/books?id=GbTunraqTqsC&hl=&source=gbs_api |
| EBook | FULL_PUBLIC_DOMAIN |