Columbia subject headings:
Foraminifera, Fossil--Ecuador.
Geology, Stratigraphic--Tertiary.
Geology--Ecuador.
Paleontology--Tertiary.
Harvard subject headings:
Foraminifera, Fossil.
Geology, Stratigraphic--Tertiary
Geology--Ecuador.
Paleontology--Ecuador.
Paleontology--Tertiary
Princeton subject headings:
Foraminifera, Fossil--Ecuador.
Geology, Stratigraphic--Tertiary.
Geology--Ecuador.
Paleontology--Tertiary.