| 其他書名 | Proceedings of the Sixth National Conference of City and County Directors, December 8-10, 1968, Washington, D. C. |
| 出版 | Council of City and County Directors, American Association for Health, Physical Education, and Recreation, 1969 |
| URL | http://books.google.com.hk/books?id=_aOuJwAACAAJ&hl=&source=gbs_api |