| 其他書名 | An Essay Read Before the Professors and Students of Earlham College, Richmond, Ind., Fifth Month 15th, 1880 |
| 出版 | Central Tract Committee on the New York Yearly Meeting of Friends, 1880 |
| URL | http://books.google.com.hk/books?id=yEQtAAAAYAAJ&hl=&source=gbs_api |
| EBook | FULL_PUBLIC_DOMAIN |