Philosophical geometry
South Otselic (N.Y.) 1972. 166 S.
Lectures on the philosophy of mathematics
Amsterdam 1982. 170 S.
Introduction to mathematical thinking
New York 1951. 260 S.
From mathematics to philosophy
London 1974. 428 S.
Philosophy of mathematics and natural science
Princeton (N.J.) 1949. 376 S.
Principia mathematica
Cambridge (England) 1959–1960. 3 Bde.
Introduction to the foundations of mathematics
London 1953. 305 S.