| 其他書名 | An Address, by Robert G. Dunlop, President, Sun Oil Company, at the Columbia University Oil Centennial Symposium, New York City, November 4, 1959 |
| 出版 | Sun Oil Company, Public Relations Department, 1959 |
| URL | http://books.google.com.hk/books?id=PMsvAwEACAAJ&hl=&source=gbs_api |