| 其他書名 | Report of an Investigation by the Virginia State Board of Health, the Department of Education of the University of Virginia, and the Virginia State Department of Education |
| 出版 | U.S. Government Printing Office, 1914 |
| URL | http://books.google.com.hk/books?id=uxE_AQAAMAAJ&hl=&source=gbs_api |
| EBook | FULL_PUBLIC_DOMAIN |