| 其他書名 | The Problem of the Future : a Presidential Address Delivered by Karl Pearson at the Annual Meeting of the Social and Political Education League, April 28, 1910 |
| 出版 | Cambridge University Press, 1913 |
| URL | http://books.google.com.hk/books?id=6wfTswEACAAJ&hl=&source=gbs_api |