- Saint Helens, Mount (Wash.)7
- Saint Helens, Mount (Wash.) -- Eruption, 19804
- Saint Helens, Mount (Wash.) -- Eruption, 1980 -- Environmental aspects2
- Volcanic ash, tuff, etc. -- Environmental aspects -- Washington (State)2
- Broilers (Poultry)1
- Geophysics1
- Hydrology -- Washington (State) -- Saint Helens, Mount, Region1
- Idaho -- Antiquities1
- Legionella pneumophila1
- Legionnaires' disease1
- Magmatism -- Washington (State) -- Saint Helens, Mount1
- Magnetotelluric prospecting1
- Plant ecology -- Washington (State)1
- Plant succession -- Washington (State)1
- Range plants -- Northwest, Pacific1
- Rangelands -- Effect of volcanic eruptions on -- Northwest, Pacific1
- Riparian plants1
- Saint Helens, Mount (Wash.) -- Eruption, 1980 -- Physiological effect1
- Saint Helens, Mount (Wash.) -- Eruptions1
- Saint Helens, Mount, Region (Wash.)1