Title: Differences in response to volcanic ashfall among Douglas-fir seedlings at genetic test plantations in western Washington
Subjects: Douglas fir, Effect of volcanic ash on Plants, Environmental aspects, Environmental aspects of Volcanic ash, tuff, etc, Eruption, 1980, Plants, Effect of volcanic ash on, Volcanic ash, tuff, Wounds and injuries
Places: Mount (Wash.) Saint Helens, Mount Saint Helens, Saint Helens, Mount (Wash.), Washington (State)