Columbia subject headings:
Harvard subject headings:
Blacklisting of authors--California--Hollywood (Los Angeles)
Communism--United States--1917-
Lawson, John Howard, 1894-
Screenwriters--United States--Biography
Princeton subject headings:
Blacklisting of authors--California--Hollywood.
Communism--United States.
Lawson, John Howard, 1894-1977.
Screenwriters--United States--Biography.