1994 International Environmental conference

by International Environmental Conference (1994 Portland, Ore.)

1990 International Printing and Graphic Arts Conference

by International Printing and Graphic Arts Conference. (1990 Vancouver, B.C.)

7th International Symposium on Corrosion in the Paper & Pulp...

by International Symposium on Corrosion in the Pulp & Paper Industry (7th 1992 Orlando, Fla.)

9th International Symposium on Corrosion in the Pulp and Pap...

by International Symposium on Corrosion in the Pulp and Paper Industry