| 其他書名 | Eighth General Assembly and Seventeenth International Congress. Washington, D.C. August 8-15, 1952 |
| 出版 | United States National Committee of the International Geographical Union, 1952 |
| URL | http://books.google.com.hk/books?id=7uA6AQAAIAAJ&hl=&source=gbs_api |