Columbia subject headings:
Harvard subject headings:
Drifters--History--Congresses.
Homeless persons--History--Congresses.
Marginality, Social, in literature--Congresses.
Marginality, Social--Congresses.
Rogues and vagabonds in literature--Congresses.
Rogues and vagabonds--History--Congresses.
Tramps--History--Congresses.
Princeton subject headings:
Drifters--History--Congresses.
Homeless persons--History--Congresses.
Rogues and vagabonds--History--Congresses.
Tramps--History--Congresses.