Columbia subject headings:
Foraminifera--Ecology--Mexico, Gulf of.
Foraminifera--Mexico, Gulf of--Geographical distribution.
Protozoa--Ecology--Mexico, Gulf of.
Protozoa--Ecology.
Protozoa--Geographical distribution.
Protozoa--Mexico, Gulf of--Geographical distribution.
Harvard subject headings:
Foraminifera--Ecology--Mexico, Gulf of.
Foraminifera--Mexico, Gulf of--Geographical distribution.
Protozoa--Ecology--Mexico, Gulf of.
Protozoa--Ecology.
Protozoa--Geographical distribution.
Protozoa--Mexico, Gulf of--Geographical distribution.
Princeton subject headings: