| 其他書名 | Papers Delivered by George R. Potter and John Butt at the First Clark Library Seminar, 22 Novermber 1952 |
| 出版 | William Andrews Clark Memorial Library, University of California, 1952 |
| URL | http://books.google.com.hk/books?id=T20OAAAAMAAJ&hl=&source=gbs_api |