| 其他書名 | Cost and Utilization of Power and Equipment on Farms in the Central Piedmont |
| 出版 | Agricultural Experiment Station of the North Carolina State College of Agriculture and Engineering and Bureau of Agricultural Economics, U.S. Department of Agriculture, 1947 |
| URL | http://books.google.com.hk/books?id=0b8pAQAAMAAJ&hl=&source=gbs_api |