Columbia subject headings:
Harvard subject headings:
De Morgan, Augustus, 1806-1871.
Hamilton, William, Sir, 1788-1856
Logic, Symbolic and mathematical.
Predicate calculus.
Syllogism
Princeton subject headings:
De Morgan, Augustus, 1806-1871.
Hamilton, William, Sir, 1788-1856.
Logic, Symbolic and mathematical.
Predicate calculus.
Syllogism.