Columbia subject headings:
Harvard subject headings:
Plant communities--Washington (State)--Saint Helens, Mount, Region--Congresses.
Plant ecology--Washington (State)--Saint Helens, Mount, Region--Congresses.
Saint Helens, Mount (Wash.)--Eruption, 1980--Congresses.
Vegetation dynamics--Washington (State)--Saint Helens, Mount, Region--Congresses.
Princeton subject headings:
Botany--Washington (State)--Saint Helens, Mount, Region--Ecology--Congresses.
Plant communities--Washington (State)--Saint Helens, Mount, Region--Congresses.
Saint Helens, Mount--Eruption, 1980--Congresses.
Vegetation dynamics--Washington (State)--Saint Helens, Mount, Region--Congresses.