Columbia subject headings:
Gladden, Washington, 1836-1918--Bibliography.
Gladden, Washington, 1836-1918--Manuscripts--Indexes.
Gladden, Washington, 1836-1918. Papers--Indexes.
Harvard subject headings:
Gladden, Washington, 1836-1918--Bibliography.
Princeton subject headings:
Gladden, Washington, 1836-1918--Bibliography.
Gladden, Washington, 1836-1918--Manuscripts--Indexes.