Columbia subject headings:
Brouwer, L. E. J. (Luitzen Egbertus Jan), 1881-1966.
Intuitionistic mathematics.
Mathematics--Philosophy.
Harvard subject headings:
Brouwer, L. E. J. (Luitzen Egbertus Jan), 1881-1966--Congresses.
Intuitionistic mathematics--History--Congresses.
Mathematics--Philosophy--Congresses
Princeton subject headings:
Brouwer, L. E. J. (Luitzen Egbertus Jan), 1881-1966.
Intuitionistic mathematics.
Mathematics--Philosophy.