Columbia subject headings:
B films--United States--History and criticism.
Grand National Pictures--History.
Lippert Pictures, Inc.--History.
Motion picture studios--United States--History.
Producers' Releasing Corporation--History.
Screen Guild Productions--History.
Harvard subject headings:
B films--United States--History and criticism.
Grand National Pictures--History.
Lippert Pictures, Inc.--History.
Motion picture studios--United States--History.
Producers' Releasing Corporation--History.
Screen Guild Productions--History.
Princeton subject headings: