Columbia subject headings:
Harvard subject headings:
Clackamas County (Or.)--Antiquities.
Excavations (Archaeology)--Oregon--Clackamas County.
Indians of North America--Northwest, Pacific--Antiquities.
Mount Hood National Forest (Or.)--Antiquities.
Oregon--Antiquities.
Princeton subject headings:
Clackamas County (Or.)--Antiquities.
Excavations (Archaeology)--Mount Hood National Forest (Or.).
Mount Hood National Forest (Or.)--Antiquities.
Ripple Site (Or.)
Stone implements--Mount Hood National Forest (Or.).