Columbia subject headings:
Indeterminate sentences--United States--Congresses.
Prison sentences--United States--Congresses.
Sentences (Criminal procedure)--United States--Congresses.
Harvard subject headings:
Indeterminate sentences--United States--Congresses.
Prison sentences--United States--Congresses.
Sentences (Criminal procedure)--United States--Congresses.
Princeton subject headings:
Indeterminate sentences--United States--Congresses.
Prison sentences--United States--Congresses.
Sentences (Criminal procedure)--United States--Congresses.