Columbia subject headings:
Harvard subject headings:
Brachiopoda, Fossil--Congresses.
Brachiopoda--Congresses.
Bryozoa, Fossil--Congresses.
Bryozoa--Congresses.
Princeton subject headings:
Brachiopoda, Fossil--Congresses.
Brachiopoda--Congresses.
Bryozoa, Fossil--Congresses.
Bryozoa--Congresses.