| 其他書名 | A Statistical Study Based on Certificates Issued by the Food Products Inspection Service of the Bureau of Agricultural Economics During the Period from November 1, 1917, to July 1, 1921 |
| 出版 | U.S. Department of Agriculture, 1924 |
| URL | http://books.google.com.hk/books?id=XddwAQAACAAJ&hl=&source=gbs_api |