Author
Nova Scotia Petroleum Directorate
3
Natural Areas Association (U.S.)
2
Geological Survey (U.S.)
1
Geological Survey of Canada
1
Kostylev, V.E.
1
National Earthquake Information Center
1
Pickrill, R.A.
1
Society of American Foresters
1
Todd, B. J.
1
U.S. Forest Service. Northern Research Station
1
Valentine, P.C.
1