Author
United States. Forest Service
80
Ontario. Ministry of Natural Resources
27
Ontario Ministry of Natural Resources
20
United States Geological Survey
17
DNAG
15
United States. Bureau of Mines
15
Geological Society of America
14
Canadian Forest Service
12
Canadian Forestry Service
12
NORTHEASTERN FOREST EXPERIMENT STATION
12
Ontario Forest Research Institute
12
DECADE OF NORTH AMERICAN GEOLOGY
11
Great Lakes Forest Research Centre
11
Northeastern Forest Experiment Station (Radnor, Pa.)
11
North Central Forest Experiment Station (Saint Paul, Minn.)
10
Canadian Forest Industries Council
9
Northeastern Research Station
9
Geological Survey of Canada
8
Great Lakes Forestry Centre
8
Petawawa National Forestry Institute
8
United States Department of Agriculture. Forest Service
8
United States. Department of Agriculture
8
Graham, D. P.
7
INTERMOUNTAIN FOREST AND RANGE EXPERIMENT STATION
7
PACIFIC NORTHWEST RESEARCH STATION
7
Canada/United States Spruce Budworms Program
6
ENERGY, MINES AND RESOURCES CANADA
6
Gottschalk, Kurt W.
6
Natural Resources Canada
6
ROCKY MOUNTAIN FOREST AND RANGE EXPERIMENT STATION
6
UNITED STATES DEPARTMENT OF THE INTERIOR
6
Berry, A. B.
5
Giancola, Diane
5
IGWG
5
INTERMOUNTAIN RESEARCH STATION
5
MINE ENVIRONMENT NEUTRAL DRAINAGE PROGRAM
5
Nova Scotia Department of Mines and Energy
5
Society of American Foresters
5
UNITED STATES DEPARTMENT OF AGRICULTURE
5
UNITED STATES FISH AND WILDLIFE SERVICE
5
United States. Cooperative State Research Service
5
AMERICAN SOCIETY FOR SURFACE MINING AND RECLAMATION AND THE CANADIAN LAND RECLAMATION ASSOCIATION, ANNUAL MEETING PROCEEDINGS OF A CONFERENCE PITTSBURGH, PENNSYLVANIA
4
Birdsey, Richard A.
4
Duda, M. D.
4
Herzstein, R. E.
4
IEA Coal Research
4
INTERGOVERNMENTAL WORKING GROUP ON THE MINERAL INDUSTRY
4
International Energy Agency
4
MEND
4
Mitsch, William J.
4
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