| 其他書名 | Its Phenology, Cone Maturity, and Seed Production in the San Francisco Peaks, Arizona |
| 出版 | Rocky Mountain Forest and Range Experiment Station, Forest Service, U.S. Department of Agriculture, 1970 |
| URL | http://books.google.com.hk/books?id=wDDgrmXcMSUC&hl=&source=gbs_api |
| EBook | FULL_PUBLIC_DOMAIN |