Kenneth W. Seidel

A ponderosa pine-lodgepole pine spacing study in central Oregon : results after 20 years /

Kenneth W. Seidel, K. Seidel, 1989 .

Assessing Physical Conditions of Some Pacific Northwest Volcanic Ash Soils After Forest Harvest

J. Geist, J. Hazard, John W. Hazard, 1989 .