Columbia subject headings:
Civil rights--United States--Congresses.
Constitutional law--United States--Congresses.
Douglas, William O. (William Orville), 1898-1980--Congresses.
Harvard subject headings:
Civil rights--United States--Congresses
Constitutional law--United States--Congresses
Douglas, William O. (William Orville), 1898-1980--Congresses.
Princeton subject headings:
Civil rights--United States--Congresses.
Constitutional law--United States--Congresses.
Douglas, William O. (William Orville), 1898-1980--Congresses.