Author
- United States. Forest Service
- Northeastern Forest Experiment Station (Radnor, Pa.) 2 results
- Intermountain Forest and Range Experiment Station (Ogden, Utah) 1 results
- Intermountain Forest and Range Experiment Station (U.S.) 1 results
- North Central Forest Experiment Station (Saint Paul, Minn.) 1 results
- Southern Forest Experiment Station (New Orleans, La.) 1 results
- United States. Northern Forest Experiment Station 1 results