| 其他書名 | The association of the date of hatch with date of first egg, sexual maturity and egg production in S.C. White Leghorns. III |
| 出版 | Agricultural Experiment Station, Iowa State College of Agriculture and Mechanic Arts, 1932 |
| URL | http://books.google.com.hk/books?id=xMFQAQAAMAAJ&hl=&source=gbs_api |