Columbia subject headings:
Bradley, F. H. (Francis Herbert), 1846-1924.
Hegel, Georg Wilhelm Friedrich, 1770-1831.
Ontology--History--19th century.
Ontology--History--20th century.
Relation (Philosophy)--History--19th century.
Relation (Philosophy)--History--20th century.
Russell, Bertrand, 1872-1970.
Harvard subject headings:
Bradley, F. H. (Francis Herbert), 1846-1924.
Hegel, Georg Wilhelm Friedrich, 1770-1831
Ontology--History--19th century.
Ontology--History--20th century.
Relation (Philosophy)--History--19th century.
Relation (Philosophy)--History--20th century.
Russell, Bertrand, 1872-1970
Princeton subject headings: