Columbia subject headings:
Harvard subject headings:
Biology--Research--United States--History--20th century--Congresses.
Medicine--Research--United States--History--20th century--Congresses.
National Cancer Institute (U.S.)--History--20th century--Congresses.
National Institute of Mental Health (U.S.)--History--20th century--Congresses.
National Institutes of Health (U.S.)
National Institutes of Health (U.S.)--History--20th century--Congresses.
Princeton subject headings:
Biology--Research--United States--History--20th century--Congresses.
Medicine--Research--United States--History--20th century--Congresses.