| 其他書名 | Talk Presented at Purdue Marketing Clinic, Purdue University, Feb. 24, 1960 |
| 出版 | United States, Agricultural Marketing Service, Transportation and Facilities Research Division, 1960 |
| URL | http://books.google.com.hk/books?id=ZXHbuQEACAAJ&hl=&source=gbs_api |