Literature references
3 literature references:
| Author: | Little, E.L. |
|---|---|
| Year: | 1979 |
| Title: | Checklist of United States trees (native and naturalized) |
| Source: | Forest Service, USDA, Washington, D.C. |
| Author: | Burns, R.M. & Honkala, B.H. |
|---|---|
| Year: | 1990 |
| Title: | Silvics of North America. Vol. 1. Conifers (Agriculture Handbook 654) |
| Source: | USDA Forest Service, Washington, D.C. |
| Author: | Farjon, A. |
|---|---|
| Year: | 2010 |
| Title: | A Handbook of the World's Conifers |
| Source: | E.J. Brill, Leiden |