| 其他書名 | Six Papers Commissioned by the UCD Kellogg Program, Cooperative Extension, and the Giannini Foundation of Agricultural Economics |
| 出版 | Division of Agricultural Sciences, University of California, 1978 |
| URL | http://books.google.com.hk/books?id=Rg89AAAAYAAJ&hl=&source=gbs_api |