Columbia subject headings:
Economics--Congresses.
George, Henry, 1839-1897. Progress and poverty--Congresses.
Land value taxation--Congresses.
Single tax--Congresses.
Harvard subject headings:
Economics--Congresses
George, Henry, 1839-1897. Progress and poverty--Congresses.
Land value taxation--Congresses.
Single tax--Congresses.
Princeton subject headings:
Economics--Congresses.
George, Henry, 1839-1897. Progress and poverty--Congresses.
Land value taxation--Congresses.
Single tax--Congresses.