Canada. Parliament. House of Commons.
United States. Bureau of the Census
Unknown Author
James A. Jacobs
Hans C. Behr
John R. Hawley
Vance E. Nichols
Williams, Donald R.
George A. Desborough
Dale W. Blevins
Adão Benvindo da Luz
V. E. Gleason
Geoffrey S. Simate
David L. Naftz
Stephen Michell
International Conference on Acid Rock Drainage (4th 1997 Vancouver, B.C.)