Columbia subject headings:
Catfishes--United States--Statistics--Periodicals.
Fish culture--United States--Statistics--Periodicals.
Fishery products--United States--Statistics--Periodicals.
Harvard subject headings:
Catfish fisheries--Economic aspects--United States--Statistics--Periodicals.
Fish culture--United States--Statistics--Periodicals.
Fishery products--United States--Statistics--Periodicals.
Princeton subject headings: