| 其他書名 | Proceedings of a Work Conference, Philadelphia Conference, July 2 and 3, 1955, Co-sponsored by the ALA Committee on Intellectual Freedom and the Public Libraries Division |
| 出版 | Public Libraries Division, American Library Association, 1955 |
| URL | http://books.google.com.hk/books?id=3cQ8AAAAMAAJ&hl=&source=gbs_api |