Columbia subject headings:
Harvard subject headings:
Allen, George, 1832-1907--Catalogs.
George Allen & Company (London, England)--Catalogs.
George Allen & Sons (London, England)--Catalogs.
George Allen & Unwin Ltd--Catalogs.
Ruskin, John, 1819-1900--Bibliography.
Princeton subject headings:
George Allen & Unwin Ltd.
Ruskin, John, 1819-1900--Bibliography.