| 其他書名 | Prepared for the Conference on the Development of Library Services in Latin America, at São Paulo, Brazil, October 3-12, 1951 |
| 出版 | Department of Cultural Affairs, Pan American Union, 1951 |
| URL | http://books.google.com.hk/books?id=D1AtAQAAIAAJ&hl=&source=gbs_api |