| 其他書名 | Monthly Egg Production, Layers on Farms, Pullets Not of Laying Age, and Rate of Lay by States and Geographic Regions, Revised Estimates, 1955-59 |
| 出版 | U.S. Department of Agriculture, Statistical Reporting Service, Crop Reporting Board, 1960 |
| URL | http://books.google.com.hk/books?id=uSgijgEACAAJ&hl=&source=gbs_api |