| 其他書名 | Under the Educational Research and Development Center Program |
| 出版 | Office of Research, Office of Educational Research and Improvement, U.S. Department of Education, 1990 |
| URL | http://books.google.com.hk/books?id=035jxZt19ssC&hl=&source=gbs_api |
| EBook | FULL_PUBLIC_DOMAIN |