Author
Bjorkbom, John C., 1915-
1
Canadian Forest Service
1
Erdmann, Gayne G.
1
Metzger, Frederick T.
1
Natural Resources Canada
1
North Central Forest Experiment Station (Saint Paul, Minn.)
1
Northeastern Forest Experiment Station
1
Northeastern Forest Experiment Station (Radnor, Penns.)
1
Oberg, Robert R.
1
Roberts, B. A.
1
Safford, Lawrence O.
1
Titus, B. D.
1
USDA Forest Service
1