Columbia subject headings:
Logic.
Mercier, Désiré, 1851-1926.
Ontology.
Scholasticism.
Harvard subject headings:
Logic
Mercier, Désiré, 1851-1926
Ontology.
Scholasticism.
Princeton subject headings:
Logic.
Mercier, Désiré, 1851-1926.
Ontology.
Scholasticism.